Subtract 6/15 from 15/21
15/21 - 6/15 is 11/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
15/21 = 15 × 5/21 × 5 = 75/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
6/15 = 6 × 7/15 × 7 = 42/105 - Subtract the two like fractions:
75/105 - 42/105 = 75 - 42/105 = 33/105 - After reducing the fraction, the answer is 11/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21-6/15 15/21-12/15 15/42-6/15 15/21-6/30 45/21-6/15 15/21-18/15 15/63-6/15 15/21-6/45 75/21-6/15 15/21-30/15 15/21-6/75 15/21-42/15