Add 36/7 and 21/9
1st number: 5 1/7, 2nd number: 2 3/9
36/7 + 21/9 is 157/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
36/7 = 36 × 9/7 × 9 = 324/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63 - Add the two like fractions:
324/63 + 147/63 = 324 + 147/63 = 471/63 - 471/63 simplified gives 157/21
- So, 36/7 + 21/9 = 157/21
In mixed form: 710/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/7+21/9 36/7+42/9 36/14+21/9 36/7+21/18 36/7+63/9 36/21+21/9 36/7+21/27 36/35+21/9 36/7+21/45 36/49+21/9 36/7+21/63