Add 21/27 and 6/15
21/27 + 6/15 is 53/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 15 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Likewise, for the 2nd fraction, since 15 × 9 = 135,
6/15 = 6 × 9/15 × 9 = 54/135 - Add the two like fractions:
105/135 + 54/135 = 105 + 54/135 = 159/135 - 159/135 simplified gives 53/45
- So, 21/27 + 6/15 = 53/45
In mixed form: 18/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27+6/15 21/27+12/15 21/54+6/15 21/27+6/30 63/27+6/15 21/27+18/15 21/81+6/15 21/27+6/45 21/27+30/15 21/27+6/75 21/27+42/15