Answers

Subtract 8/14 from 5/21

5/21 - 8/14 is -1/3.

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,
   5/21 = 5 × 2/21 × 2 = 10/42
3. Likewise, for the 2nd fraction, since 14 × 3 = 42,
   8/14 = 8 × 3/14 × 3 = 24/42
4. Subtract the two like fractions:
   10/42 - 24/42 = 10 - 24/42 = -14/42
5. After reducing the fraction, the answer is -1/3

MathStep (Works offline)

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

Related: ¹⁰/₂₁-⁸/₁₄ ⁵/₂₁-¹⁶/₁₄ ⁵/₄₂-⁸/₁₄ ⁵/₂₁-⁸/₂₈ ¹⁵/₂₁-⁸/₁₄ ⁵/₂₁-²⁴/₁₄ ⁵/₆₃-⁸/₁₄ ⁵/₂₁-⁸/₄₂ ²⁵/₂₁-⁸/₁₄ ⁵/₂₁-⁴⁰/₁₄ ⁵/₂₁-⁸/₇₀ ³⁵/₂₁-⁸/₁₄ ⁵/₂₁-⁵⁶/₁₄ ⁵/₂₁-⁸/₉₈

Subtract Fractions Calculator