Add 7/70 and 21/7
1st number: 7/70, 2nd number: 3 0/7
7/70 + 21/7 is 31/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
7/70 = 7 × 1/70 × 1 = 7/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Add the two like fractions:
7/70 + 210/70 = 7 + 210/70 = 217/70 - 217/70 simplified gives 31/10
- So, 7/70 + 21/7 = 31/10
In mixed form: 31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70+21/7 7/70+42/7 7/70+21/14 21/70+21/7 7/70+63/7 35/70+21/7 7/70+21/35 49/70+21/7 7/70+21/49