Subtract 20/48 from 5/21
5/21 - 20/48 is -5/28.
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,
5/21 = 5 × 16/21 × 16 = 80/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
20/48 = 20 × 7/48 × 7 = 140/336 - Subtract the two like fractions:
80/336 - 140/336 = 80 - 140/336 = -60/336 - After reducing the fraction, the answer is -5/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-20/48 5/21-40/48 5/42-20/48 5/21-20/96 15/21-20/48 5/21-60/48 5/63-20/48 25/21-20/48 35/21-20/48