Subtract 21/48 from 40/21
1st number: 1 19/21, 2nd number: 21/48
40/21 - 21/48 is 493/336.
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,
40/21 = 40 × 16/21 × 16 = 640/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
21/48 = 21 × 7/48 × 7 = 147/336 - Subtract the two like fractions:
640/336 - 147/336 = 640 - 147/336 = 493/336 - In mixed form: 1157/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-21/48 40/21-42/48 40/42-21/48 40/21-21/96 40/21-63/48 40/63-21/48