Add 10/7 and 21/20
1st number: 1 3/7, 2nd number: 1 1/20
10/7 + 21/20 is 347/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
10/7 = 10 × 20/7 × 20 = 200/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Add the two like fractions:
200/140 + 147/140 = 200 + 147/140 = 347/140 - So, 10/7 + 21/20 = 347/140
In mixed form: 267/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/7+21/20 10/7+42/20 10/14+21/20 10/7+21/40 30/7+21/20 10/7+63/20 10/21+21/20 10/7+21/60 50/7+21/20 10/35+21/20 70/7+21/20 10/49+21/20