Answers

Subtract 42/27 from 50/63

1^st number: 50/63, 2^nd number: 1 15/27

50/63 - 42/27 is -16/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 27 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 63 × 3 = 189,
   50/63 = 50 × 3/63 × 3 = 150/189
3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
   42/27 = 42 × 7/27 × 7 = 294/189
4. Subtract the two like fractions:
   150/189 - 294/189 = 150 - 294/189 = -144/189
5. After reducing the fraction, the answer is -16/21

MathStep (Works offline)

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

Related: ⁵⁰/₆₃-⁸⁴/₂₇ ⁵⁰/₆₃-⁴²/₅₄ ⁵⁰/₆₃-⁴²/₈₁

Subtract Fractions Calculator