Subtract 21/75 from 1/21
1/21 - 21/75 is -122/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 75 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
1/21 = 1 × 25/21 × 25 = 25/525 - Likewise, for the 2nd fraction, since 75 × 7 = 525,
21/75 = 21 × 7/75 × 7 = 147/525 - Subtract the two like fractions:
25/525 - 147/525 = 25 - 147/525 = -122/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-21/75 1/21-42/75 1/42-21/75 3/21-21/75 1/21-63/75 1/63-21/75 5/21-21/75 7/21-21/75