Answers

Subtract 30/80 from 70/28

1^st number: 2 14/28, 2^nd number: 30/80

70/28 - 30/80 is 17/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 28 × 20 = 560,
   70/28 = 70 × 20/28 × 20 = 1400/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   30/80 = 30 × 7/80 × 7 = 210/560
4. Subtract the two like fractions:
   1400/560 - 210/560 = 1400 - 210/560 = 1190/560
5. After reducing the fraction, the answer is 17/8
6. In mixed form: 21/8

MathStep (Works offline)

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

Related: ⁷⁰/₂₈-⁶⁰/₈₀ ⁷⁰/₅₆-³⁰/₈₀ ⁷⁰/₂₈-⁹⁰/₈₀ ⁷⁰/₈₄-³⁰/₈₀

Subtract Fractions Calculator