Add 1/15 and 21/7
1st number: 1/15, 2nd number: 3 0/7
1/15 + 21/7 is 46/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
1/15 = 1 × 7/15 × 7 = 7/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
21/7 = 21 × 15/7 × 15 = 315/105 - Add the two like fractions:
7/105 + 315/105 = 7 + 315/105 = 322/105 - 322/105 simplified gives 46/15
- So, 1/15 + 21/7 = 46/15
In mixed form: 31/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15+21/7 1/15+42/7 1/30+21/7 1/15+21/14 3/15+21/7 1/15+63/7 1/45+21/7 5/15+21/7 1/75+21/7 1/15+21/35 7/15+21/7 1/15+21/49