Answers

Subtract 40/5 from 10/42

1^st number: 10/42, 2^nd number: 8 0/5

10/42 - 40/5 is -163/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 5 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   10/42 = 10 × 5/42 × 5 = 50/210
3. Likewise, for the 2nd fraction, since 5 × 42 = 210,
   40/5 = 40 × 42/5 × 42 = 1680/210
4. Subtract the two like fractions:
   50/210 - 1680/210 = 50 - 1680/210 = -1630/210
5. After reducing the fraction, the answer is -163/21

MathStep (Works offline)

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

Related: ²⁰/₄₂-⁴⁰/₅ ¹⁰/₄₂-⁸⁰/₅ ¹⁰/₈₄-⁴⁰/₅ ¹⁰/₄₂-⁴⁰/₁₀ ³⁰/₄₂-⁴⁰/₅ ¹⁰/₄₂-⁴⁰/₁₅ ⁵⁰/₄₂-⁴⁰/₅ ¹⁰/₄₂-⁴⁰/₂₅ ⁷⁰/₄₂-⁴⁰/₅ ¹⁰/₄₂-⁴⁰/₃₅

Subtract Fractions Calculator