Answers

Subtract 90/27 from 49/20

1^st number: 2 9/20, 2^nd number: 3 9/27

49/20 - 90/27 is -53/60.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   49/20 = 49 × 27/20 × 27 = 1323/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   90/27 = 90 × 20/27 × 20 = 1800/540
4. Subtract the two like fractions:
   1323/540 - 1800/540 = 1323 - 1800/540 = -477/540
5. After reducing the fraction, the answer is -53/60

MathStep (Works offline)

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

Related: ⁹⁸/₂₀-⁹⁰/₂₇ ⁴⁹/₄₀-⁹⁰/₂₇ ⁴⁹/₂₀-⁹⁰/₅₄ ⁴⁹/₆₀-⁹⁰/₂₇ ⁴⁹/₂₀-⁹⁰/₈₁

Subtract Fractions Calculator