Answers

Subtract 90/6 from 24/21

1^st number: 1 3/21, 2^nd number: 15 0/6

24/21 - 90/6 is -97/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 6 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 21 × 2 = 42,
   24/21 = 24 × 2/21 × 2 = 48/42
3. Likewise, for the 2nd fraction, since 6 × 7 = 42,
   90/6 = 90 × 7/6 × 7 = 630/42
4. Subtract the two like fractions:
   48/42 - 630/42 = 48 - 630/42 = -582/42
5. After reducing the fraction, the answer is -97/7

MathStep (Works offline)

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

Related: ⁴⁸/₂₁-⁹⁰/₆ ²⁴/₄₂-⁹⁰/₆ ²⁴/₂₁-⁹⁰/₁₂ ⁷²/₂₁-⁹⁰/₆ ²⁴/₆₃-⁹⁰/₆ ²⁴/₂₁-⁹⁰/₁₈ ²⁴/₂₁-⁹⁰/₃₀ ²⁴/₂₁-⁹⁰/₄₂

Subtract Fractions Calculator