Subtract 9/8 from 81/28
1st number: 2 25/28, 2nd number: 1 1/8
81/28 - 9/8 is 99/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
81/28 = 81 × 2/28 × 2 = 162/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
9/8 = 9 × 7/8 × 7 = 63/56 - Subtract the two like fractions:
162/56 - 63/56 = 162 - 63/56 = 99/56 - In mixed form: 143/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28-18/8 81/56-9/8 81/28-9/16 81/28-27/8 81/84-9/8 81/28-9/24 81/28-45/8 81/28-9/40 81/28-63/8 81/28-9/56