Answers

Subtract 84/20 from 56/42

1^st number: 1 14/42, 2^nd number: 4 4/20

56/42 - 84/20 is -43/15.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   56/42 = 56 × 10/42 × 10 = 560/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   84/20 = 84 × 21/20 × 21 = 1764/420
4. Subtract the two like fractions:
   560/420 - 1764/420 = 560 - 1764/420 = -1204/420
5. After reducing the fraction, the answer is -43/15

MathStep (Works offline)

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

Related: ⁵⁶/₈₄-⁸⁴/₂₀ ⁵⁶/₄₂-⁸⁴/₄₀ ⁵⁶/₄₂-⁸⁴/₆₀

Subtract Fractions Calculator