Subtract 21/25 from 2/21
2/21 - 21/25 is -391/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
2/21 = 2 × 25/21 × 25 = 50/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
21/25 = 21 × 21/25 × 21 = 441/525 - Subtract the two like fractions:
50/525 - 441/525 = 50 - 441/525 = -391/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-21/25 2/21-42/25 2/42-21/25 2/21-21/50 6/21-21/25 2/21-63/25 2/63-21/25 2/21-21/75 10/21-21/25 14/21-21/25