Subtract 63/21 from 18/25
1st number: 18/25, 2nd number: 3 0/21
18/25 - 63/21 is -57/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
18/25 = 18 × 21/25 × 21 = 378/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
63/21 = 63 × 25/21 × 25 = 1575/525 - Subtract the two like fractions:
378/525 - 1575/525 = 378 - 1575/525 = -1197/525 - After reducing the fraction, the answer is -57/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/25-63/21 18/50-63/21 18/25-63/42 54/25-63/21 18/75-63/21 90/25-63/21