Subtract 7/20 from 7/32
7/32 - 7/20 is -21/160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 20 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 32 × 5 = 160,
7/32 = 7 × 5/32 × 5 = 35/160 - Likewise, for the 2nd fraction, since 20 × 8 = 160,
7/20 = 7 × 8/20 × 8 = 56/160 - Subtract the two like fractions:
35/160 - 56/160 = 35 - 56/160 = -21/160
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/32-7/20 7/32-14/20 7/64-7/20 7/32-7/40 21/32-7/20 7/32-21/20 7/96-7/20 7/32-7/60 35/32-7/20 7/32-35/20 49/32-7/20 7/32-49/20