Answers

Subtract 20/8 from 8/18

1^st number: 8/18, 2^nd number: 2 4/8

8/18 - 20/8 is -37/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 8 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 18 × 4 = 72,
   8/18 = 8 × 4/18 × 4 = 32/72
3. Likewise, for the 2nd fraction, since 8 × 9 = 72,
   20/8 = 20 × 9/8 × 9 = 180/72
4. Subtract the two like fractions:
   32/72 - 180/72 = 32 - 180/72 = -148/72
5. After reducing the fraction, the answer is -37/18

MathStep (Works offline)

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

Related: ¹⁶/₁₈-²⁰/₈ ⁸/₁₈-⁴⁰/₈ ⁸/₃₆-²⁰/₈ ⁸/₁₈-²⁰/₁₆ ²⁴/₁₈-²⁰/₈ ⁸/₁₈-⁶⁰/₈ ⁸/₅₄-²⁰/₈ ⁸/₁₈-²⁰/₂₄ ⁴⁰/₁₈-²⁰/₈ ⁸/₉₀-²⁰/₈ ⁸/₁₈-²⁰/₄₀ ⁵⁶/₁₈-²⁰/₈ ⁸/₁₈-²⁰/₅₆

Subtract Fractions Calculator