Answers

Subtract 15/28 from 20/63

20/63 - 15/28 is -55/252.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 28 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   20/63 = 20 × 4/63 × 4 = 80/252
3. Likewise, for the 2nd fraction, since 28 × 9 = 252,
   15/28 = 15 × 9/28 × 9 = 135/252
4. Subtract the two like fractions:
   80/252 - 135/252 = 80 - 135/252 = -55/252

MathStep (Works offline)

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

Related: ⁴⁰/₆₃-¹⁵/₂₈ ²⁰/₆₃-³⁰/₂₈ ²⁰/₆₃-¹⁵/₅₆ ⁶⁰/₆₃-¹⁵/₂₈ ²⁰/₆₃-⁴⁵/₂₈ ²⁰/₆₃-¹⁵/₈₄ ²⁰/₆₃-⁷⁵/₂₈

Subtract Fractions Calculator