Answers

Subtract 42/28 from 10/20

1^st number: 10/20, 2^nd number: 1 14/28

10/20 - 42/28 is -1/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 28 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   10/20 = 10 × 7/20 × 7 = 70/140
3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
   42/28 = 42 × 5/28 × 5 = 210/140
4. Subtract the two like fractions:
   70/140 - 210/140 = 70 - 210/140 = -140/140
5. After reducing the fraction, the answer is -1/1

MathStep (Works offline)

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

Related: ¹⁰/₂₀-⁸⁴/₂₈ ¹⁰/₄₀-⁴²/₂₈ ¹⁰/₂₀-⁴²/₅₆ ³⁰/₂₀-⁴²/₂₈ ¹⁰/₆₀-⁴²/₂₈ ¹⁰/₂₀-⁴²/₈₄ ⁵⁰/₂₀-⁴²/₂₈ ⁷⁰/₂₀-⁴²/₂₈

Subtract Fractions Calculator