In VBA (Visual Basic for Applications), the FormatPercent function is used to format a number as a percentage with a specified number of decimal places.

Basic syntax

FormatPercent(Expression, [NumDigitsAfterDecimal], [IncludeLeadingDigit], [UseParensForNegativeNumbers], [GroupDigits])

Parameters

• Expression is the numeric value you want to format as a percentage.
• NumDigitsAfterDecimal (optional) specifies the number of digits to be displayed after the decimal point.
• IncludeLeadingDigit (optional) specifies whether or not a leading zero is displayed for fractional percentages.
• UseParensForNegativeNumbers (optional) specifies whether or not to place negative numbers within parentheses.
• GroupDigits (optional) specifies whether or not numbers are grouped using the group delimiter (e.g., “1,000” for thousand).

Here’s an example of how you can use the FormatPercent function in VBA:

Sub FormatPercentageExample()
    Dim myValue As Double
    myValue = 0.12345 ' 12.345%
    
    ' Format the percentage without any optional arguments
    Debug.Print FormatPercent(myValue) ' By default should print "12.35%"
    
    ' Format the percentage with 1 decimal place
    Debug.Print FormatPercent(myValue, 1) ' Should print "12.3%"
    
    ' Format the percentage with 2 decimal places and no leading digit for values less than 1
    Debug.Print FormatPercent(myValue, 2, True) ' Should print "12.35%"
    
    ' Format the percentage with 2 decimal places and parentheses for negative numbers (none in this example)
    Debug.Print FormatPercent(myValue, 2, True, True) ' Should print "12.35%"
    
    ' Format the percentage with grouping digits (not applicable in most percentage formats)
    Debug.Print FormatPercent(myValue, 2, True, True, True) ' Should print "12.35%"
End Sub

Remember, the result of FormatPercent is a string representation of the number formatted as a percentage. The actual numeric value does not change. This is useful for displaying percentages in user interfaces, reports, or concatenations with other strings where the visual format is important.

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