Add 6/15 and 63/21
1st number: 6/15, 2nd number: 3 0/21
6/15 + 63/21 is 17/5.
Steps for adding 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,
6/15 = 6 × 7/15 × 7 = 42/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105 - Add the two like fractions:
42/105 + 315/105 = 42 + 315/105 = 357/105 - 357/105 simplified gives 17/5
- So, 6/15 + 63/21 = 17/5
In mixed form: 32/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/15+63/21 6/30+63/21 6/15+63/42 18/15+63/21 6/45+63/21 30/15+63/21 6/75+63/21 42/15+63/21