Subtract 6/21 from 5/15
5/15 - 6/21 is 1/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
5/15 = 5 × 7/15 × 7 = 35/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
6/21 = 6 × 5/21 × 5 = 30/105 - Subtract the two like fractions:
35/105 - 30/105 = 35 - 30/105 = 5/105 - After reducing the fraction, the answer is 1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15-6/21 5/15-12/21 5/30-6/21 5/15-6/42 5/15-18/21 5/45-6/21 5/15-6/63 25/15-6/21 5/15-30/21 5/75-6/21 35/15-6/21 5/15-42/21