Subtract 18/49 from 21/75
21/75 - 18/49 is -107/1225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 49 is 3675
Next, find the equivalent fraction of both fractional numbers with denominator 3675 - For the 1st fraction, since 75 × 49 = 3675,
21/75 = 21 × 49/75 × 49 = 1029/3675 - Likewise, for the 2nd fraction, since 49 × 75 = 3675,
18/49 = 18 × 75/49 × 75 = 1350/3675 - Subtract the two like fractions:
1029/3675 - 1350/3675 = 1029 - 1350/3675 = -321/3675 - After reducing the fraction, the answer is -107/1225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75-18/49 21/75-36/49 21/75-18/98 63/75-18/49 21/75-54/49 21/75-90/49