Subtract 21/7 from 4/25
1st number: 4/25, 2nd number: 3 0/7
4/25 - 21/7 is -71/25.
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,
4/25 = 4 × 7/25 × 7 = 28/175 - Likewise, for the 2nd fraction, since 7 × 25 = 175,
21/7 = 21 × 25/7 × 25 = 525/175 - Subtract the two like fractions:
28/175 - 525/175 = 28 - 525/175 = -497/175 - After reducing the fraction, the answer is -71/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/25-21/7 4/25-42/7 4/50-21/7 4/25-21/14 12/25-21/7 4/25-63/7 4/75-21/7 20/25-21/7 4/25-21/35 28/25-21/7 4/25-21/49