Answers

Subtract 25/63 from 15/42

15/42 - 25/63 is -5/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 63 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 42 × 3 = 126,
   15/42 = 15 × 3/42 × 3 = 45/126
3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
   25/63 = 25 × 2/63 × 2 = 50/126
4. Subtract the two like fractions:
   45/126 - 50/126 = 45 - 50/126 = -5/126

MathStep (Works offline)

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

Related: ³⁰/₄₂-²⁵/₆₃ ¹⁵/₄₂-⁵⁰/₆₃ ¹⁵/₈₄-²⁵/₆₃ ⁴⁵/₄₂-²⁵/₆₃ ¹⁵/₄₂-⁷⁵/₆₃ ⁷⁵/₄₂-²⁵/₆₃

Subtract Fractions Calculator