Subtract 27/7 from 21/25
1st number: 21/25, 2nd number: 3 6/7
21/25 - 27/7 is -528/175.
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,
21/25 = 21 × 7/25 × 7 = 147/175 - Likewise, for the 2nd fraction, since 7 × 25 = 175,
27/7 = 27 × 25/7 × 25 = 675/175 - Subtract the two like fractions:
147/175 - 675/175 = 147 - 675/175 = -528/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-27/7 21/25-54/7 21/50-27/7 21/25-27/14 63/25-27/7 21/25-81/7 21/75-27/7 21/25-27/21 21/25-27/35 21/25-27/49