Answers

Subtract 72/7 from 54/8

1^st number: 6 6/8, 2^nd number: 10 2/7

54/8 - 72/7 is -99/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 7 is 56
   
   Next, find the equivalent fraction of both fractional numbers with denominator 56
2. For the 1st fraction, since 8 × 7 = 56,
   54/8 = 54 × 7/8 × 7 = 378/56
3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
   72/7 = 72 × 8/7 × 8 = 576/56
4. Subtract the two like fractions:
   378/56 - 576/56 = 378 - 576/56 = -198/56
5. After reducing the fraction, the answer is -99/28

MathStep (Works offline)

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

Related: ⁵⁴/₁₆-⁷²/₇ ⁵⁴/₈-⁷²/₁₄ ⁵⁴/₂₄-⁷²/₇ ⁵⁴/₈-⁷²/₂₁ ⁵⁴/₄₀-⁷²/₇ ⁵⁴/₈-⁷²/₃₅ ⁵⁴/₅₆-⁷²/₇ ⁵⁴/₈-⁷²/₄₉

Subtract Fractions Calculator