Answers

Subtract 40/42 from 70/63

1^st number: 1 7/63, 2^nd number: 40/42

70/63 - 40/42 is 10/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 42 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 63 × 2 = 126,
   70/63 = 70 × 2/63 × 2 = 140/126
3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
   40/42 = 40 × 3/42 × 3 = 120/126
4. Subtract the two like fractions:
   140/126 - 120/126 = 140 - 120/126 = 20/126
5. After reducing the fraction, the answer is 10/63

MathStep (Works offline)

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

Related: ⁷⁰/₆₃-⁸⁰/₄₂ ⁷⁰/₆₃-⁴⁰/₈₄

Subtract Fractions Calculator