Subtract 21/14 from 1/15
1st number: 1/15, 2nd number: 1 7/14
1/15 - 21/14 is -43/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 14 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
1/15 = 1 × 14/15 × 14 = 14/210 - Likewise, for the 2nd fraction, since 14 × 15 = 210,
21/14 = 21 × 15/14 × 15 = 315/210 - Subtract the two like fractions:
14/210 - 315/210 = 14 - 315/210 = -301/210 - After reducing the fraction, the answer is -43/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15-21/14 1/15-42/14 1/30-21/14 1/15-21/28 3/15-21/14 1/15-63/14 1/45-21/14 1/15-21/42 5/15-21/14 1/75-21/14 1/15-21/70 7/15-21/14 1/15-21/98