Subtract 3/7 from 21/32
21/32 - 3/7 is 51/224.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 7 is 224
Next, find the equivalent fraction of both fractional numbers with denominator 224 - For the 1st fraction, since 32 × 7 = 224,
21/32 = 21 × 7/32 × 7 = 147/224 - Likewise, for the 2nd fraction, since 7 × 32 = 224,
3/7 = 3 × 32/7 × 32 = 96/224 - Subtract the two like fractions:
147/224 - 96/224 = 147 - 96/224 = 51/224
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/32-3/7 21/32-6/7 21/64-3/7 21/32-3/14 63/32-3/7 21/32-9/7 21/96-3/7 21/32-3/21 21/32-15/7 21/32-3/35 21/32-21/7 21/32-3/49