Subtract 4/20 from 20/32
20/32 - 4/20 is 17/40.
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,
20/32 = 20 × 5/32 × 5 = 100/160 - Likewise, for the 2nd fraction, since 20 × 8 = 160,
4/20 = 4 × 8/20 × 8 = 32/160 - Subtract the two like fractions:
100/160 - 32/160 = 100 - 32/160 = 68/160 - After reducing the fraction, the answer is 17/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/32-4/20 20/32-8/20 20/64-4/20 20/32-4/40 60/32-4/20 20/32-12/20 20/96-4/20 20/32-4/60 20/32-28/20