Subtract 21/7 from 10/25
1st number: 10/25, 2nd number: 3 0/7
10/25 - 21/7 is -13/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 7 is 175
Next, find the equivalent fraction of both fractional numbers with denominator 175 - For the 1st fraction, since 25 × 7 = 175,
10/25 = 10 × 7/25 × 7 = 70/175 - Likewise, for the 2nd fraction, since 7 × 25 = 175,
21/7 = 21 × 25/7 × 25 = 525/175 - Subtract the two like fractions:
70/175 - 525/175 = 70 - 525/175 = -455/175 - After reducing the fraction, the answer is -13/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/25-21/7 10/25-42/7 10/50-21/7 10/25-21/14 30/25-21/7 10/25-63/7 10/75-21/7 50/25-21/7 10/25-21/35 70/25-21/7 10/25-21/49