Answers

Subtract 27/14 from 20/21

1^st number: 20/21, 2^nd number: 1 13/14

20/21 - 27/14 is -41/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 14 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 21 × 2 = 42,
   20/21 = 20 × 2/21 × 2 = 40/42
3. Likewise, for the 2nd fraction, since 14 × 3 = 42,
   27/14 = 27 × 3/14 × 3 = 81/42
4. Subtract the two like fractions:
   40/42 - 81/42 = 40 - 81/42 = -41/42

MathStep (Works offline)

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

Related: ⁴⁰/₂₁-²⁷/₁₄ ²⁰/₂₁-⁵⁴/₁₄ ²⁰/₄₂-²⁷/₁₄ ²⁰/₂₁-²⁷/₂₈ ⁶⁰/₂₁-²⁷/₁₄ ²⁰/₂₁-⁸¹/₁₄ ²⁰/₆₃-²⁷/₁₄ ²⁰/₂₁-²⁷/₄₂ ²⁰/₂₁-²⁷/₇₀ ²⁰/₂₁-²⁷/₉₈

Subtract Fractions Calculator