Answers

Subtract 75/54 from 7/20

1^st number: 7/20, 2^nd number: 1 21/54

7/20 - 75/54 is -187/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 54 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   7/20 = 7 × 27/20 × 27 = 189/540
3. Likewise, for the 2nd fraction, since 54 × 10 = 540,
   75/54 = 75 × 10/54 × 10 = 750/540
4. Subtract the two like fractions:
   189/540 - 750/540 = 189 - 750/540 = -561/540
5. After reducing the fraction, the answer is -187/180

MathStep (Works offline)

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

Related: ¹⁴/₂₀-⁷⁵/₅₄ ⁷/₄₀-⁷⁵/₅₄ ²¹/₂₀-⁷⁵/₅₄ ⁷/₆₀-⁷⁵/₅₄ ³⁵/₂₀-⁷⁵/₅₄ ⁴⁹/₂₀-⁷⁵/₅₄

Subtract Fractions Calculator