Add 7/15 and 21/27
7/15 + 21/27 is 56/45.
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,
7/15 = 7 × 9/15 × 9 = 63/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Add the two like fractions:
63/135 + 105/135 = 63 + 105/135 = 168/135 - 168/135 simplified gives 56/45
- So, 7/15 + 21/27 = 56/45
In mixed form: 111/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15+21/27 7/15+42/27 7/30+21/27 7/15+21/54 21/15+21/27 7/15+63/27 7/45+21/27 7/15+21/81 35/15+21/27 7/75+21/27 49/15+21/27