Answers

Subtract 20/80 from 56/54

1^st number: 1 2/54, 2^nd number: 20/80

56/54 - 20/80 is 85/108.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 80 is 2160
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2160
2. For the 1st fraction, since 54 × 40 = 2160,
   56/54 = 56 × 40/54 × 40 = 2240/2160
3. Likewise, for the 2nd fraction, since 80 × 27 = 2160,
   20/80 = 20 × 27/80 × 27 = 540/2160
4. Subtract the two like fractions:
   2240/2160 - 540/2160 = 2240 - 540/2160 = 1700/2160
5. After reducing the fraction, the answer is 85/108

MathStep (Works offline)

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

Related: ⁵⁶/₅₄-⁴⁰/₈₀ ⁵⁶/₅₄-⁶⁰/₈₀

Subtract Fractions Calculator