Subtract 7/32 from 15/21
15/21 - 7/32 is 111/224.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 21 × 32 = 672,
15/21 = 15 × 32/21 × 32 = 480/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
7/32 = 7 × 21/32 × 21 = 147/672 - Subtract the two like fractions:
480/672 - 147/672 = 480 - 147/672 = 333/672 - After reducing the fraction, the answer is 111/224
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21-7/32 15/21-14/32 15/42-7/32 15/21-7/64 45/21-7/32 15/21-21/32 15/63-7/32 15/21-7/96 75/21-7/32 15/21-35/32 15/21-49/32