Answers

Subtract 72/20 from 56/70

1^st number: 56/70, 2^nd number: 3 12/20

56/70 - 72/20 is -14/5.

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,
   56/70 = 56 × 2/70 × 2 = 112/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   72/20 = 72 × 7/20 × 7 = 504/140
4. Subtract the two like fractions:
   112/140 - 504/140 = 112 - 504/140 = -392/140
5. After reducing the fraction, the answer is -14/5

MathStep (Works offline)

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

Related: ⁵⁶/₇₀-⁷²/₄₀ ⁵⁶/₇₀-⁷²/₆₀

Subtract Fractions Calculator