Add 12/18 and 63/81
12/18 + 63/81 is 13/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
12/18 = 12 × 9/18 × 9 = 108/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
63/81 = 63 × 2/81 × 2 = 126/162 - Add the two like fractions:
108/162 + 126/162 = 108 + 126/162 = 234/162 - 234/162 simplified gives 13/9
- So, 12/18 + 63/81 = 13/9
In mixed form: 14/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+63/81 12/36+63/81 36/18+63/81 12/54+63/81 60/18+63/81 12/90+63/81 84/18+63/81