Subtract 7/21 from 15/32
15/32 - 7/21 is 13/96.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 21 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 32 × 21 = 672,
15/32 = 15 × 21/32 × 21 = 315/672 - Likewise, for the 2nd fraction, since 21 × 32 = 672,
7/21 = 7 × 32/21 × 32 = 224/672 - Subtract the two like fractions:
315/672 - 224/672 = 315 - 224/672 = 91/672 - After reducing the fraction, the answer is 13/96
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/32-7/21 15/32-14/21 15/64-7/21 15/32-7/42 45/32-7/21 15/96-7/21 15/32-7/63 75/32-7/21 15/32-35/21 15/32-49/21