Answers

Subtract 72/70 from 35/42

1^st number: 35/42, 2^nd number: 1 2/70

35/42 - 72/70 is -41/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 70 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   35/42 = 35 × 5/42 × 5 = 175/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   72/70 = 72 × 3/70 × 3 = 216/210
4. Subtract the two like fractions:
   175/210 - 216/210 = 175 - 216/210 = -41/210

MathStep (Works offline)

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

Related: ⁷⁰/₄₂-⁷²/₇₀ ³⁵/₈₄-⁷²/₇₀

Subtract Fractions Calculator