Subtract 21/75 from 1/15
1/15 - 21/75 is -16/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 75 is 75
Next, find the equivalent fraction of both fractional numbers with denominator 75 - For the 1st fraction, since 15 × 5 = 75,
1/15 = 1 × 5/15 × 5 = 5/75 - Likewise, for the 2nd fraction, since 75 × 1 = 75,
21/75 = 21 × 1/75 × 1 = 21/75 - Subtract the two like fractions:
5/75 - 21/75 = 5 - 21/75 = -16/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15-21/75 1/15-42/75 1/30-21/75 3/15-21/75 1/15-63/75 1/45-21/75 5/15-21/75 1/75-21/75 7/15-21/75