Answers

Subtract 7/15 from 14/21

14/21 - 7/15 is 1/5.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 15 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   14/21 = 14 × 5/21 × 5 = 70/105
3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
   7/15 = 7 × 7/15 × 7 = 49/105
4. Subtract the two like fractions:
   70/105 - 49/105 = 70 - 49/105 = 21/105
5. After reducing the fraction, the answer is 1/5

MathStep (Works offline)

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

Related: ²⁸/₂₁-⁷/₁₅ ¹⁴/₂₁-¹⁴/₁₅ ¹⁴/₄₂-⁷/₁₅ ¹⁴/₂₁-⁷/₃₀ ⁴²/₂₁-⁷/₁₅ ¹⁴/₂₁-²¹/₁₅ ¹⁴/₆₃-⁷/₁₅ ¹⁴/₂₁-⁷/₄₅ ⁷⁰/₂₁-⁷/₁₅ ¹⁴/₂₁-³⁵/₁₅ ¹⁴/₂₁-⁷/₇₅ ⁹⁸/₂₁-⁷/₁₅ ¹⁴/₂₁-⁴⁹/₁₅

Subtract Fractions Calculator