Subtract 30/48 from 10/21
10/21 - 30/48 is -25/168.
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,
10/21 = 10 × 16/21 × 16 = 160/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
30/48 = 30 × 7/48 × 7 = 210/336 - Subtract the two like fractions:
160/336 - 210/336 = 160 - 210/336 = -50/336 - After reducing the fraction, the answer is -25/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21-30/48 10/21-60/48 10/42-30/48 10/21-30/96 30/21-30/48 10/21-90/48 10/63-30/48 50/21-30/48 70/21-30/48