Answers

Subtract 20/84 from 56/45

1^st number: 1 11/45, 2^nd number: 20/84

56/45 - 20/84 is 317/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 84 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 45 × 28 = 1260,
   56/45 = 56 × 28/45 × 28 = 1568/1260
3. Likewise, for the 2nd fraction, since 84 × 15 = 1260,
   20/84 = 20 × 15/84 × 15 = 300/1260
4. Subtract the two like fractions:
   1568/1260 - 300/1260 = 1568 - 300/1260 = 1268/1260
5. After reducing the fraction, the answer is 317/315
6. In mixed form: 12/315

MathStep (Works offline)

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

Related: ⁵⁶/₄₅-⁴⁰/₈₄ ⁵⁶/₉₀-²⁰/₈₄ ⁵⁶/₄₅-⁶⁰/₈₄

Subtract Fractions Calculator