Answers

Subtract 27/4 from 70/21

1^st number: 3 7/21, 2^nd number: 6 3/4

70/21 - 27/4 is -41/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   70/21 = 70 × 4/21 × 4 = 280/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   27/4 = 27 × 21/4 × 21 = 567/84
4. Subtract the two like fractions:
   280/84 - 567/84 = 280 - 567/84 = -287/84
5. After reducing the fraction, the answer is -41/12

MathStep (Works offline)

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

Related: ⁷⁰/₂₁-⁵⁴/₄ ⁷⁰/₄₂-²⁷/₄ ⁷⁰/₂₁-²⁷/₈ ⁷⁰/₂₁-⁸¹/₄ ⁷⁰/₆₃-²⁷/₄ ⁷⁰/₂₁-²⁷/₁₂ ⁷⁰/₂₁-²⁷/₂₀ ⁷⁰/₂₁-²⁷/₂₈

Subtract Fractions Calculator