Add 9/15 and 21/27
9/15 + 21/27 is 62/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
9/15 = 9 × 9/15 × 9 = 81/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Add the two like fractions:
81/135 + 105/135 = 81 + 105/135 = 186/135 - 186/135 simplified gives 62/45
- So, 9/15 + 21/27 = 62/45
In mixed form: 117/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+21/27 9/15+42/27 9/30+21/27 9/15+21/54 27/15+21/27 9/15+63/27 9/45+21/27 9/15+21/81 45/15+21/27 9/75+21/27 63/15+21/27