Butterfly Method for Fraction Formulas :Numerator = ( __ x __ ) − ( __ x __ )Denominator = __ x __Example :3/4 - 2/5Numerator = ( 3 × 5 ) − ( 2 × 4 ) = 7Denominator = 5 × 4 = 20So, 3/4 - 2/5 = 7/20 View Details