Add 20/7 and 21/10
1st number: 2 6/7, 2nd number: 2 1/10
20/7 + 21/10 is 347/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
20/7 = 20 × 10/7 × 10 = 200/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Add the two like fractions:
200/70 + 147/70 = 200 + 147/70 = 347/70 - So, 20/7 + 21/10 = 347/70
In mixed form: 467/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7+21/10 20/7+42/10 20/14+21/10 20/7+21/20 60/7+21/10 20/7+63/10 20/21+21/10 20/7+21/30 20/35+21/10 20/7+21/50 20/49+21/10 20/7+21/70