Answers

Subtract 90/80 from 10/28

1^st number: 10/28, 2^nd number: 1 10/80

10/28 - 90/80 is -43/56.

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,
   10/28 = 10 × 20/28 × 20 = 200/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   90/80 = 90 × 7/80 × 7 = 630/560
4. Subtract the two like fractions:
   200/560 - 630/560 = 200 - 630/560 = -430/560
5. After reducing the fraction, the answer is -43/56

MathStep (Works offline)

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

Related: ²⁰/₂₈-⁹⁰/₈₀ ¹⁰/₅₆-⁹⁰/₈₀ ³⁰/₂₈-⁹⁰/₈₀ ¹⁰/₈₄-⁹⁰/₈₀ ⁵⁰/₂₈-⁹⁰/₈₀ ⁷⁰/₂₈-⁹⁰/₈₀

Subtract Fractions Calculator