Answers

Subtract 84/20 from 15/70

1^st number: 15/70, 2^nd number: 4 4/20

15/70 - 84/20 is -279/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 70 × 2 = 140,
   15/70 = 15 × 2/70 × 2 = 30/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   84/20 = 84 × 7/20 × 7 = 588/140
4. Subtract the two like fractions:
   30/140 - 588/140 = 30 - 588/140 = -558/140
5. After reducing the fraction, the answer is -279/70

MathStep (Works offline)

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

Related: ³⁰/₇₀-⁸⁴/₂₀ ¹⁵/₇₀-⁸⁴/₄₀ ⁴⁵/₇₀-⁸⁴/₂₀ ¹⁵/₇₀-⁸⁴/₆₀ ⁷⁵/₇₀-⁸⁴/₂₀

Subtract Fractions Calculator