Answers

Subtract 21/80 from 35/28

1^st number: 1 7/28, 2^nd number: 21/80

35/28 - 21/80 is 79/80.

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,
   35/28 = 35 × 20/28 × 20 = 700/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   21/80 = 21 × 7/80 × 7 = 147/560
4. Subtract the two like fractions:
   700/560 - 147/560 = 700 - 147/560 = 553/560
5. After reducing the fraction, the answer is 79/80

MathStep (Works offline)

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

Related: ⁷⁰/₂₈-²¹/₈₀ ³⁵/₂₈-⁴²/₈₀ ³⁵/₅₆-²¹/₈₀ ³⁵/₂₈-⁶³/₈₀ ³⁵/₈₄-²¹/₈₀

Subtract Fractions Calculator