## What is GCD Function in Excel?

The **GCD **function is one of the math functions of Excel.

It Returns the **greatest common divisor**.

We can find this function in **Math & trig** category of insert function Tab.

## How to use GCD function in excel

- Click on
**an empty cell**(like F5 )

2. Click on **fx icon** (or press** shift+F3**)

3. In the** insert function tab** you will see all functions

4. Select **math and trig** category

5. Select **GCD **function

6. Then select **ok**

7. In the function arguments Tab you will see **GCD **function

8 & 9. Numbers: number1,number2,… **are 1 to 255 values**

10. You will see **results **in the formula result section

## Examples of **GCD** function in Excel

- To find the greatest common divisor of two numbers:

=GCD(12, 18)

This would return a result of 6.

- To find the greatest common divisor of multiple numbers:

=GCD(12, 18, 24)

This would return a result of 6.

- To find the greatest common divisor of a range of cells:

=GCD(A1:A5)

Assuming that cells A1 through A5 contain the values {12, 18, 24, 30, 36}, this would return a result of 6.

- To use the GCD function in a conditional formatting rule:

=MOD(A1,GCD($A1:1:A$5))=0

Assuming that cells A1 through A5 contain the values {12, 18, 24, 30, 36}, this formula would highlight all cells in column A that are divisible by their greatest common divisor.

- To find the ratio of two numbers reduced to lowest terms:

=A1/GCD(A1,A2)&”:”&A2/GCD(A1,A2)

Assuming that cells A1 and A2 contain the values 24 and 36, respectively, this would return a result of “2:3”.

- To find the least common multiple of two numbers:

=(A1*A2)/GCD(A1,A2)

Assuming that cells A1 and A2 contain the values 12 and 18, respectively, this would return a result of 36.

- To find the sum of fractions with different denominators:

=(A1/B1)+(A2/B2)

Assuming that cells A1 through B2 contain the values {2, 3} and {5, 8}, respectively, this formula would return a result of 31/24.

- To find the GCD of two fractions:

=GCD(A1*B2,A2*B1)/(A1*A2)

Assuming that cells A1 through B2 contain the values {3, 4} and {5, 6}, respectively, this formula would return a result of 1/12.

- To use the GCD function in a custom function:

Function ReducedFraction(numerator, denominator) Dim gcd As Integer gcd = WorksheetFunction.GCD(numerator, denominator) ReducedFraction = numerator / gcd & “/” & denominator / gcd End Function

This custom function takes two arguments (numerator and denominator), finds their greatest common divisor using the GCD function, reduces the fraction to lowest terms, and returns the result as a string in the format “numerator/denominator”.

- To find the GCD of a set of numbers input by the user:

=IFERROR(GCD(A1:A10), “Please enter at least two values”)

**Example 1:**

**How to use GCD function in excel**

You can see examples of GCD function below:

**gcd**(A2,B2) ----->>>>answer is 3
**gcd**(A3,B3) ----->>>>answer is 9
**gcd**(A4,B4) ----->>>>answer is 2
**gcd**(A5,B5) ----->>>>answer is 10
**gcd**(A6,B6) ----->>>>answer is 1

## Excel’s GCD function: the go-to tool for finding greatest common divisors

Excel’s GCD (Greatest Common Divisor) function is a powerful tool that allows users to quickly and easily find the largest number that divides two or more integers without leaving a remainder. This can be useful in a wide range of applications, from simplifying fractions to calculating the period of oscillation in physics.

For example, to find the GCD of two numbers (12 and 18), simply enter the following formula into a cell in Excel: =GCD(12, 18)

This would return a result of 6, which is the largest number that divides both 12 and 18 without leaving a remainder.

## Excel users rejoice: the GCD function is here to stay on all versions of the software

Excel users can rest assured that the GCD function is here to stay on all versions of the software, including Excel Online and the mobile app. This makes it easy for users to access this valuable tool from any device with an internet connection.

For example, a user can use the GCD function on their mobile phone to quickly calculate the greatest common divisor of two numbers while on the go.

## A comprehensive guide to formatting the output of Excel’s GCD function

To format the output of Excel’s GCD function, follow these steps:

- Select the cell containing the formula.
- Right-click and select “Format Cells” from the context menu.
- In the Format Cells dialog box, select the “Number” tab.
- Under “Category,” select “Custom.”
- In the “Type” field, enter the desired format code.

For example, if you want to display the output of the GCD function with five decimal places, you can use the following format code: 0.00000

## Case studies from different industries and disciplines: Excel’s GCD function in action

Excel’s GCD function is used in a wide range of industries and disciplines, from finance and engineering to statistics and computer science. Here are some examples of how it is used:

- In finance, the GCD function is used to calculate the periodicity of cash flows in investments.
- In electrical engineering, the GCD function is used to calculate the period of oscillation in circuits.
- In computer science, the GCD function is used to implement algorithms in number theory and cryptography.
- In statistics, the GCD function is used to find the greatest common divisor of two or more numbers in data sets.

For example, a financial analyst who needs to calculate the periodicity of an investment with cash flows of $1000 every six months can use the GCD function to determine that the period is six months (i.e., the GCD of 12 and 6 is 6).

## Excel’s GCD function supports internationalization and localization efforts worldwide

Excel’s GCD function is a versatile tool that supports internationalization and localization efforts worldwide. This means that users can customize the output of the function to match their local formatting standards, including language, currency, and date and time formats.

For example, a user in France who wants to calculate the greatest common divisor of two numbers (24 and 36) can use the following formula, which uses the French function name for GCD (“PGCD”):

=PGCD(24, 36)

This would return a result of 12, which is the largest number that divides both 24 and 36 without leaving a remainder, formatted according to the user’s local settings.

## Experts compare Excel’s GCD function with other software tools: pros and cons revealed

Experts have compared Excel’s GCD function with other software tools, such as MATLAB, Mathematica, and Python, and have identified several pros and cons of each tool.

One advantage of Excel’s GCD function is its ease of use and accessibility, since it is included in the standard set of functions in Microsoft Excel. However, some experts have noted that Excel’s implementation of the Euclidean algorithm used by the GCD function is slower and less accurate than other software tools.

For example, a researcher who needs to find the greatest common divisor of two large numbers may choose to use MATLAB instead of Excel due to MATLAB’s faster and more accurate implementation of the Euclidean algorithm.

## How to simplify fractions using Excel’s GCD function

To simplify a fraction using Excel’s GCD function, follow these steps:

- Enter the numerator and denominator of the fraction into separate cells in Excel.
- Use the GCD function to find the greatest common divisor of the numerator and denominator.
- Divide both the numerator and denominator by the greatest common divisor to reduce the fraction to its simplest form.

For example, to simplify the fraction 24/36 using Excel’s GCD function, follow these steps:

- Enter “24” into cell A1 and “36” into cell A2.
- Use the following formula to find the greatest common divisor of 24 and 36: =GCD(A1, A2) This would return a result of 12.
- Divide both the numerator (24) and denominator (36) by the greatest common divisor (12) to get the simplified fraction: 24/36 = 2/3

## Excel’s GCD function can be used in custom functions created in VBA code

Excel’s GCD function can be used in custom functions created in VBA (Visual Basic for Applications) code. This allows users to create customized functions that incorporate the GCD function along with other Excel features, such as conditional statements and user input.

For example, a user could create a custom function that calculates the greatest common divisor of a range of cells by using the GCD function within VBA code.

## Using Excel’s GCD function in conditional formatting rules: best practices

To use Excel’s GCD function in conditional formatting rules, follow these best practices:

- Select the range of cells you want to apply the formatting rule to.
- Click “Conditional Formatting” in the “Styles” group on the “Home” tab.
- Click “New Rule” and select “Use a formula to determine which cells to format.”
- Enter the formula that uses the GCD function to evaluate the cell values.
- Choose the desired formatting options for cells that meet the criteria.

For example, to highlight cells in a range that have a greatest common divisor of 4 or greater, use the following formula in the conditional formatting rule: =GCD(A1,B1)>=4

This would apply the chosen formatting options to all cells in the selected range that meet the criteria.

## The Euclidean algorithm and Excel’s GCD function explained

The Euclidean algorithm is the basis for Excel’s GCD function and is used to find the greatest common divisor of two or more integers. It works by dividing the larger number by the smaller number and repeating the process until the remainder is zero. The last non-zero remainder is the greatest common divisor.

For example, to find the greatest common divisor of 24 and 36 using the Euclidean algorithm:

- Divide 36 by 24 to get a remainder of 12.
- Divide 24 by 12 to get a remainder of 0.
- The greatest common divisor of 24 and 36 is the last non-zero remainder, which is 12.

Excel’s GCD function uses the Euclidean algorithm to find the greatest common divisor of two or more numbers entered as arguments in the function. This allows users to quickly and easily calculate the GCD without having to manually perform the division and remainder calculations.