Answers

Subtract 56/54 from 6/21

1^st number: 6/21, 2^nd number: 1 2/54

6/21 - 56/54 is -142/189.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 21 × 18 = 378,
   6/21 = 6 × 18/21 × 18 = 108/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   56/54 = 56 × 7/54 × 7 = 392/378
4. Subtract the two like fractions:
   108/378 - 392/378 = 108 - 392/378 = -284/378
5. After reducing the fraction, the answer is -142/189

MathStep (Works offline)

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

Related: ¹²/₂₁-⁵⁶/₅₄ ⁶/₄₂-⁵⁶/₅₄ ¹⁸/₂₁-⁵⁶/₅₄ ⁶/₆₃-⁵⁶/₅₄ ³⁰/₂₁-⁵⁶/₅₄ ⁴²/₂₁-⁵⁶/₅₄

Subtract Fractions Calculator