Add 21/20 and 6/7
1st number: 1 1/20, 2nd number: 6/7
21/20 + 6/7 is 267/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
6/7 = 6 × 20/7 × 20 = 120/140 - Add the two like fractions:
147/140 + 120/140 = 147 + 120/140 = 267/140 - So, 21/20 + 6/7 = 267/140
In mixed form: 1127/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+6/7 21/20+12/7 21/40+6/7 21/20+6/14 63/20+6/7 21/20+18/7 21/60+6/7 21/20+6/21 21/20+30/7 21/20+6/35 21/20+42/7 21/20+6/49