Subtract 21/48 from 80/42
1st number: 1 38/42, 2nd number: 21/48
80/42 - 21/48 is 493/336.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 42 × 8 = 336,
80/42 = 80 × 8/42 × 8 = 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: 80/42-42/48 80/84-21/48 80/42-21/96 80/42-63/48