Subtract 3/72 from 21/96
21/96 - 3/72 is 17/96.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 96 and 72 is 288
Next, find the equivalent fraction of both fractional numbers with denominator 288 - For the 1st fraction, since 96 × 3 = 288,
21/96 = 21 × 3/96 × 3 = 63/288 - Likewise, for the 2nd fraction, since 72 × 4 = 288,
3/72 = 3 × 4/72 × 4 = 12/288 - Subtract the two like fractions:
63/288 - 12/288 = 63 - 12/288 = 51/288 - After reducing the fraction, the answer is 17/96
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/96-3/72 21/96-6/72 63/96-3/72 21/96-9/72 21/96-15/72 21/96-21/72