Butterfly Method for Fraction

Formulas :

Numerator = ( __ x __ ) − ( __ x __ )

Denominator = __ x __


Example :

3/4 - 2/5


Numerator = ( 3 × 5 ) − ( 2 × 4 )

= 7

Denominator = 5 × 4

= 20


So, 3/4 - 2/5 = 7/20