Answers

Subtract 70/42 from 42/15

1^st number: 2 12/15, 2^nd number: 1 28/42

42/15 - 70/42 is 17/15.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 42 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 15 × 14 = 210,
   42/15 = 42 × 14/15 × 14 = 588/210
3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
   70/42 = 70 × 5/42 × 5 = 350/210
4. Subtract the two like fractions:
   588/210 - 350/210 = 588 - 350/210 = 238/210
5. After reducing the fraction, the answer is 17/15
6. In mixed form: 12/15

MathStep (Works offline)

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

Related: ⁸⁴/₁₅-⁷⁰/₄₂ ⁴²/₃₀-⁷⁰/₄₂ ⁴²/₁₅-⁷⁰/₈₄ ⁴²/₄₅-⁷⁰/₄₂ ⁴²/₇₅-⁷⁰/₄₂

Subtract Fractions Calculator