Subtract 54/7 from 81/8
1st number: 10 1/8, 2nd number: 7 5/7
81/8 - 54/7 is 135/56.
Steps for subtracting fractions
- 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 - For the 1st fraction, since 8 × 7 = 56,
81/8 = 81 × 7/8 × 7 = 567/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
54/7 = 54 × 8/7 × 8 = 432/56 - Subtract the two like fractions:
567/56 - 432/56 = 567 - 432/56 = 135/56 - In mixed form: 223/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/16-54/7 81/8-54/14 81/24-54/7 81/8-54/21 81/40-54/7 81/8-54/35 81/56-54/7 81/8-54/49