Add 6/15 and 21/70
6/15 + 21/70 is 7/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
6/15 = 6 × 14/15 × 14 = 84/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
21/70 = 21 × 3/70 × 3 = 63/210 - Add the two like fractions:
84/210 + 63/210 = 84 + 63/210 = 147/210 - 147/210 simplified gives 7/10
- So, 6/15 + 21/70 = 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/15+21/70 6/15+42/70 6/30+21/70 18/15+21/70 6/15+63/70 6/45+21/70 30/15+21/70 6/75+21/70 42/15+21/70