Answers

Subtract 21/75 from 42/56

42/56 - 21/75 is 47/100.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 75 is 4200
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4200
2. For the 1st fraction, since 56 × 75 = 4200,
   42/56 = 42 × 75/56 × 75 = 3150/4200
3. Likewise, for the 2nd fraction, since 75 × 56 = 4200,
   21/75 = 21 × 56/75 × 56 = 1176/4200
4. Subtract the two like fractions:
   3150/4200 - 1176/4200 = 3150 - 1176/4200 = 1974/4200
5. After reducing the fraction, the answer is 47/100

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁸⁴/₅₆-²¹/₇₅ ⁴²/₅₆-⁴²/₇₅ ⁴²/₅₆-⁶³/₇₅

Subtract Fractions Calculator