Subtract 18/21 from 3/48
3/48 - 18/21 is -89/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 48 × 7 = 336,
3/48 = 3 × 7/48 × 7 = 21/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
18/21 = 18 × 16/21 × 16 = 288/336 - Subtract the two like fractions:
21/336 - 288/336 = 21 - 288/336 = -267/336 - After reducing the fraction, the answer is -89/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/48-18/21 3/48-36/21 3/96-18/21 3/48-18/42 9/48-18/21 3/48-54/21 3/48-18/63 15/48-18/21 3/48-90/21 21/48-18/21