Answers

Subtract 10/21 from 8/5

1^st number: 1 3/5, 2^nd number: 10/21

8/5 - 10/21 is 118/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 5 × 21 = 105,
   8/5 = 8 × 21/5 × 21 = 168/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   10/21 = 10 × 5/21 × 5 = 50/105
4. Subtract the two like fractions:
   168/105 - 50/105 = 168 - 50/105 = 118/105
5. In mixed form: 113/105

MathStep (Works offline)

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

Related: ¹⁶/₅-¹⁰/₂₁ ⁸/₅-²⁰/₂₁ ⁸/₁₀-¹⁰/₂₁ ⁸/₅-¹⁰/₄₂ ²⁴/₅-¹⁰/₂₁ ⁸/₅-³⁰/₂₁ ⁸/₁₅-¹⁰/₂₁ ⁸/₅-¹⁰/₆₃ ⁴⁰/₅-¹⁰/₂₁ ⁸/₅-⁵⁰/₂₁ ⁸/₂₅-¹⁰/₂₁ ⁵⁶/₅-¹⁰/₂₁ ⁸/₅-⁷⁰/₂₁ ⁸/₃₅-¹⁰/₂₁

Subtract Fractions Calculator