Subtract 5/7 from 21/75
21/75 - 5/7 is -76/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 7 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
21/75 = 21 × 7/75 × 7 = 147/525 - Likewise, for the 2nd fraction, since 7 × 75 = 525,
5/7 = 5 × 75/7 × 75 = 375/525 - Subtract the two like fractions:
147/525 - 375/525 = 147 - 375/525 = -228/525 - After reducing the fraction, the answer is -76/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75-5/7 21/75-10/7 21/75-5/14 63/75-5/7 21/75-15/7 21/75-5/21 21/75-25/7 21/75-5/35 21/75-35/7 21/75-5/49