Subtract 4/48 from 7/21
7/21 - 4/48 is 1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
7/21 = 7 × 16/21 × 16 = 112/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
4/48 = 4 × 7/48 × 7 = 28/336 - Subtract the two like fractions:
112/336 - 28/336 = 112 - 28/336 = 84/336 - After reducing the fraction, the answer is 1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-4/48 7/21-8/48 7/42-4/48 7/21-4/96 7/21-12/48 7/63-4/48 35/21-4/48 7/21-20/48 49/21-4/48 7/21-28/48