Subtract 21/25 from 1/3
1/3 - 21/25 is -38/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 25 is 75
Next, find the equivalent fraction of both fractional numbers with denominator 75 - For the 1st fraction, since 3 × 25 = 75,
1/3 = 1 × 25/3 × 25 = 25/75 - Likewise, for the 2nd fraction, since 25 × 3 = 75,
21/25 = 21 × 3/25 × 3 = 63/75 - Subtract the two like fractions:
25/75 - 63/75 = 25 - 63/75 = -38/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/3-21/25 1/3-42/25 1/6-21/25 1/3-21/50 1/3-63/25 1/9-21/25 1/3-21/75 5/3-21/25 1/15-21/25 7/3-21/25 1/21-21/25