Answers

Subtract 7/16 from 1/21

1/21 - 7/16 is -131/336.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 16 is 336
   
   Next, find the equivalent fraction of both fractional numbers with denominator 336
2. For the 1st fraction, since 21 × 16 = 336,
   1/21 = 1 × 16/21 × 16 = 16/336
3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
   7/16 = 7 × 21/16 × 21 = 147/336
4. Subtract the two like fractions:
   16/336 - 147/336 = 16 - 147/336 = -131/336

MathStep (Works offline)

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

Related: ²/₂₁-⁷/₁₆ ¹/₂₁-¹⁴/₁₆ ¹/₄₂-⁷/₁₆ ¹/₂₁-⁷/₃₂ ³/₂₁-⁷/₁₆ ¹/₂₁-²¹/₁₆ ¹/₆₃-⁷/₁₆ ¹/₂₁-⁷/₄₈ ⁵/₂₁-⁷/₁₆ ¹/₂₁-³⁵/₁₆ ¹/₂₁-⁷/₈₀ ⁷/₂₁-⁷/₁₆ ¹/₂₁-⁴⁹/₁₆

Subtract Fractions Calculator