Answers

Subtract 70/27 from 28/20

1^st number: 1 8/20, 2^nd number: 2 16/27

28/20 - 70/27 is -161/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   28/20 = 28 × 27/20 × 27 = 756/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   70/27 = 70 × 20/27 × 20 = 1400/540
4. Subtract the two like fractions:
   756/540 - 1400/540 = 756 - 1400/540 = -644/540
5. After reducing the fraction, the answer is -161/135

MathStep (Works offline)

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

Related: ⁵⁶/₂₀-⁷⁰/₂₇ ²⁸/₄₀-⁷⁰/₂₇ ²⁸/₂₀-⁷⁰/₅₄ ⁸⁴/₂₀-⁷⁰/₂₇ ²⁸/₆₀-⁷⁰/₂₇ ²⁸/₂₀-⁷⁰/₈₁

Subtract Fractions Calculator