Answers

Subtract 20/40 from 8/12

8/12 - 20/40 is 1/6.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 12 × 10 = 120,
   8/12 = 8 × 10/12 × 10 = 80/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   20/40 = 20 × 3/40 × 3 = 60/120
4. Subtract the two like fractions:
   80/120 - 60/120 = 80 - 60/120 = 20/120
5. After reducing the fraction, the answer is 1/6

MathStep (Works offline)

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

Related: ¹⁶/₁₂-²⁰/₄₀ ⁸/₂₄-²⁰/₄₀ ⁸/₁₂-²⁰/₈₀ ²⁴/₁₂-²⁰/₄₀ ⁸/₁₂-⁶⁰/₄₀ ⁸/₃₆-²⁰/₄₀ ⁴⁰/₁₂-²⁰/₄₀ ⁸/₆₀-²⁰/₄₀ ⁵⁶/₁₂-²⁰/₄₀ ⁸/₈₄-²⁰/₄₀

Subtract Fractions Calculator