Add 9/7 and 21/36
1st number: 1 2/7, 2nd number: 21/36
9/7 + 21/36 is 157/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 7 × 36 = 252,
9/7 = 9 × 36/7 × 36 = 324/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Add the two like fractions:
324/252 + 147/252 = 324 + 147/252 = 471/252 - 471/252 simplified gives 157/84
- So, 9/7 + 21/36 = 157/84
In mixed form: 173/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7+21/36 9/7+42/36 9/14+21/36 9/7+21/72 27/7+21/36 9/7+63/36 9/21+21/36 45/7+21/36 9/35+21/36 63/7+21/36 9/49+21/36