Subtract 35/25 from 7/21
1st number: 7/21, 2nd number: 1 10/25
7/21 - 35/25 is -16/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
7/21 = 7 × 25/21 × 25 = 175/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
35/25 = 35 × 21/25 × 21 = 735/525 - Subtract the two like fractions:
175/525 - 735/525 = 175 - 735/525 = -560/525 - After reducing the fraction, the answer is -16/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-35/25 7/21-70/25 7/42-35/25 7/21-35/50 7/63-35/25 7/21-35/75 35/21-35/25 49/21-35/25