Subtract 21/32 from 8/28
8/28 - 21/32 is -83/224.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 32 is 224
Next, find the equivalent fraction of both fractional numbers with denominator 224 - For the 1st fraction, since 28 × 8 = 224,
8/28 = 8 × 8/28 × 8 = 64/224 - Likewise, for the 2nd fraction, since 32 × 7 = 224,
21/32 = 21 × 7/32 × 7 = 147/224 - Subtract the two like fractions:
64/224 - 147/224 = 64 - 147/224 = -83/224
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/28-21/32 8/28-42/32 8/56-21/32 8/28-21/64 24/28-21/32 8/28-63/32 8/84-21/32 8/28-21/96 40/28-21/32 56/28-21/32