Answers

Subtract 80/9 from 49/20

1^st number: 2 9/20, 2^nd number: 8 8/9

49/20 - 80/9 is -1159/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 9 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   49/20 = 49 × 9/20 × 9 = 441/180
3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
   80/9 = 80 × 20/9 × 20 = 1600/180
4. Subtract the two like fractions:
   441/180 - 1600/180 = 441 - 1600/180 = -1159/180

MathStep (Works offline)

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

Related: ⁹⁸/₂₀-⁸⁰/₉ ⁴⁹/₄₀-⁸⁰/₉ ⁴⁹/₂₀-⁸⁰/₁₈ ⁴⁹/₆₀-⁸⁰/₉ ⁴⁹/₂₀-⁸⁰/₂₇ ⁴⁹/₂₀-⁸⁰/₄₅ ⁴⁹/₂₀-⁸⁰/₆₃

Subtract Fractions Calculator