Subtract 63/21 from 21/75
1st number: 21/75, 2nd number: 3 0/21
21/75 - 63/21 is -68/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
21/75 = 21 × 7/75 × 7 = 147/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
63/21 = 63 × 25/21 × 25 = 1575/525 - Subtract the two like fractions:
147/525 - 1575/525 = 147 - 1575/525 = -1428/525 - After reducing the fraction, the answer is -68/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75-63/21 21/75-63/42 63/75-63/21