Subtract 63/21 from 30/25
1st number: 1 5/25, 2nd number: 3 0/21
30/25 - 63/21 is -9/5.
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,
30/25 = 30 × 21/25 × 21 = 630/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
63/21 = 63 × 25/21 × 25 = 1575/525 - Subtract the two like fractions:
630/525 - 1575/525 = 630 - 1575/525 = -945/525 - After reducing the fraction, the answer is -9/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/25-63/21 30/50-63/21 30/25-63/42 90/25-63/21 30/75-63/21