Answers

Subtract 45/28 from 42/56

1^st number: 42/56, 2^nd number: 1 17/28

42/56 - 45/28 is -6/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 28 is 56
   
   Next, find the equivalent fraction of both fractional numbers with denominator 56
2. For the 1st fraction, since 56 × 1 = 56,
   42/56 = 42 × 1/56 × 1 = 42/56
3. Likewise, for the 2nd fraction, since 28 × 2 = 56,
   45/28 = 45 × 2/28 × 2 = 90/56
4. Subtract the two like fractions:
   42/56 - 90/56 = 42 - 90/56 = -48/56
5. After reducing the fraction, the answer is -6/7

MathStep (Works offline)

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

Related: ⁸⁴/₅₆-⁴⁵/₂₈ ⁴²/₅₆-⁹⁰/₂₈ ⁴²/₅₆-⁴⁵/₅₆ ⁴²/₅₆-⁴⁵/₈₄

Subtract Fractions Calculator