Subtract 90/28 from 81/32
1st number: 2 17/32, 2nd number: 3 6/28
81/32 - 90/28 is -153/224.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 28 is 224
Next, find the equivalent fraction of both fractional numbers with denominator 224 - For the 1st fraction, since 32 × 7 = 224,
81/32 = 81 × 7/32 × 7 = 567/224 - Likewise, for the 2nd fraction, since 28 × 8 = 224,
90/28 = 90 × 8/28 × 8 = 720/224 - Subtract the two like fractions:
567/224 - 720/224 = 567 - 720/224 = -153/224
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/64-90/28 81/32-90/56 81/96-90/28 81/32-90/84