Answers

Subtract 28/56 from 20/75

20/75 - 28/56 is -7/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 56 is 4200
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4200
2. For the 1st fraction, since 75 × 56 = 4200,
   20/75 = 20 × 56/75 × 56 = 1120/4200
3. Likewise, for the 2nd fraction, since 56 × 75 = 4200,
   28/56 = 28 × 75/56 × 75 = 2100/4200
4. Subtract the two like fractions:
   1120/4200 - 2100/4200 = 1120 - 2100/4200 = -980/4200
5. After reducing the fraction, the answer is -7/30

MathStep (Works offline)

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

Related: ⁴⁰/₇₅-²⁸/₅₆ ⁶⁰/₇₅-²⁸/₅₆ ²⁰/₇₅-⁸⁴/₅₆

Subtract Fractions Calculator