Add 10/7 and 21/18
1st number: 1 3/7, 2nd number: 1 3/18
10/7 + 21/18 is 109/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
10/7 = 10 × 18/7 × 18 = 180/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
21/18 = 21 × 7/18 × 7 = 147/126 - Add the two like fractions:
180/126 + 147/126 = 180 + 147/126 = 327/126 - 327/126 simplified gives 109/42
- So, 10/7 + 21/18 = 109/42
In mixed form: 225/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/7+21/18 10/7+42/18 10/14+21/18 10/7+21/36 30/7+21/18 10/7+63/18 10/21+21/18 10/7+21/54 50/7+21/18 10/35+21/18 10/7+21/90 70/7+21/18 10/49+21/18