Add 1/15 and 21/27
1/15 + 21/27 is 38/45.
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,
1/15 = 1 × 9/15 × 9 = 9/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Add the two like fractions:
9/135 + 105/135 = 9 + 105/135 = 114/135 - 114/135 simplified gives 38/45
- So, 1/15 + 21/27 = 38/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15+21/27 1/15+42/27 1/30+21/27 1/15+21/54 3/15+21/27 1/15+63/27 1/45+21/27 1/15+21/81 5/15+21/27 1/75+21/27 7/15+21/27