Subtract 7/10 from 21/32
21/32 - 7/10 is -7/160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 10 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 32 × 5 = 160,
21/32 = 21 × 5/32 × 5 = 105/160 - Likewise, for the 2nd fraction, since 10 × 16 = 160,
7/10 = 7 × 16/10 × 16 = 112/160 - Subtract the two like fractions:
105/160 - 112/160 = 105 - 112/160 = -7/160
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/32-7/10 21/32-14/10 21/64-7/10 21/32-7/20 63/32-7/10 21/32-21/10 21/96-7/10 21/32-7/30 21/32-35/10 21/32-7/50 21/32-49/10 21/32-7/70