Butterfly Method for Fraction

Formulas :

Numerator = ( __ x __ ) + ( __ x __ )

Denominator = __ x __

Example :

³/₄ + ²/₅

Numerator = ( 3 x 5 ) + ( 2 x 4 )

= 23

Denominator = 5 x 4

= 20

So, ³/₄ + ²/₅ = ²³/₂₀