Answers

Subtract 54/7 from 81/56

1^st number: 1 25/56, 2^nd number: 7 5/7

81/56 - 54/7 is -351/56.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 7 is 56
   
   Next, find the equivalent fraction of both fractional numbers with denominator 56
2. For the 1st fraction, since 56 × 1 = 56,
   81/56 = 81 × 1/56 × 1 = 81/56
3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
   54/7 = 54 × 8/7 × 8 = 432/56
4. Subtract the two like fractions:
   81/56 - 432/56 = 81 - 432/56 = -351/56

MathStep (Works offline)

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

Related: ⁸¹/₅₆-⁵⁴/₁₄ ⁸¹/₅₆-⁵⁴/₂₁ ⁸¹/₅₆-⁵⁴/₃₅ ⁸¹/₅₆-⁵⁴/₄₉

Subtract Fractions Calculator