Subtract 6/9 from 21/15
1st number: 1 6/15, 2nd number: 6/9
21/15 - 6/9 is 11/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
21/15 = 21 × 3/15 × 3 = 63/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
6/9 = 6 × 5/9 × 5 = 30/45 - Subtract the two like fractions:
63/45 - 30/45 = 63 - 30/45 = 33/45 - After reducing the fraction, the answer is 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-6/9 21/15-12/9 21/30-6/9 21/15-6/18 63/15-6/9 21/15-18/9 21/45-6/9 21/15-6/27 21/15-30/9 21/75-6/9 21/15-6/45 21/15-42/9 21/15-6/63