Add 18/9 and 63/18
1st number: 2 0/9, 2nd number: 3 9/18
18/9 + 63/18 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 9 × 2 = 18,
18/9 = 18 × 2/9 × 2 = 36/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
63/18 = 63 × 1/18 × 1 = 63/18 - Add the two like fractions:
36/18 + 63/18 = 36 + 63/18 = 99/18 - 99/18 simplified gives 11/2
- So, 18/9 + 63/18 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9+63/18 18/9+63/36 54/9+63/18 18/27+63/18 18/9+63/54 90/9+63/18 18/45+63/18 18/9+63/90 18/63+63/18