Subtract 18/21 from 7/48
7/48 - 18/21 is -239/336.
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,
7/48 = 7 × 7/48 × 7 = 49/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
18/21 = 18 × 16/21 × 16 = 288/336 - Subtract the two like fractions:
49/336 - 288/336 = 49 - 288/336 = -239/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/48-18/21 7/48-36/21 7/96-18/21 7/48-18/42 21/48-18/21 7/48-54/21 7/48-18/63 35/48-18/21 7/48-90/21 49/48-18/21