Subtract 21/6 from 9/15
1st number: 9/15, 2nd number: 3 3/6
9/15 - 21/6 is -29/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 6 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
9/15 = 9 × 2/15 × 2 = 18/30 - Likewise, for the 2nd fraction, since 6 × 5 = 30,
21/6 = 21 × 5/6 × 5 = 105/30 - Subtract the two like fractions:
18/30 - 105/30 = 18 - 105/30 = -87/30 - After reducing the fraction, the answer is -29/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15-21/6 9/15-42/6 9/30-21/6 9/15-21/12 27/15-21/6 9/15-63/6 9/45-21/6 9/15-21/18 45/15-21/6 9/75-21/6 9/15-21/30 63/15-21/6 9/15-21/42