FractionMath ( fraction1 ; Fraction2 ; Operator )

Allows basic mathematical operations leaving fractions in fractional form, reduced form.

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Brett Buchmiller
None
www.filemaker.com

Sample input:

FractionMath( "1/2" ; "3/4" ; "+" )
FractionMath( "3 3/8" ; "4 4/5" ; "x" )

Sample output:

"5/4"

"16 1/5"

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/*
Mathematical operations with fractions maintaining fractional form - output is a string
Required functions
	FractionReduce
	FractionNumerator
	FractionDenominator
	GCF
	FractionType
© Brett Buchmiller 10-2011
*/

Case(
	Operator = "+" or Operator = "Add" ;FractionReduce ( FractionNumerator ( Fraction1 ) * FractionDenominator ( Fraction2 ) + FractionNumerator ( Fraction2 ) * FractionDenominator ( Fraction1 ) & "/" & FractionDenominator ( Fraction1 ) * FractionDenominator ( Fraction2 ) ; "M" ) ;
	Operator = "-" or Operator = "Subtract" ; FractionReduce ( FractionNumerator ( Fraction1 ) * FractionDenominator ( Fraction2 ) - FractionNumerator ( Fraction2 ) * FractionDenominator ( Fraction1 ) & "/" & FractionDenominator ( Fraction1 ) * FractionDenominator ( Fraction2 ) ; "M" ) ;
	Operator = "*" or Operator = "x" or Operator + "Multiply" ; FractionReduce( FractionNumerator ( Fraction1 ) * FractionNumerator ( Fraction2 ) & "/" & FractionDenominator ( Fraction1 ) * FractionDenominator ( Fraction2 ) ; "M" ) ;
	Operator = "/" or Operator = "÷" or Operator = "Divide" ; FractionReduce ( FractionNumerator ( Fraction1 ) * FractionDenominator ( Fraction2 ) & "/" & FractionDenominator ( Fraction1 ) * FractionNumerator ( Fraction2 ) ; "M" ) ;
	"Unknown operation"
)

As noted in comments of function, part of required library of functions to work with fractions. If you change the "M" in the FractionReduce function to "I", the results will be reported as improper fractions rather than mixed numbers.

Comments

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

FractionMath ( fraction1 ; Fraction2 ; Operator )

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