Add 27/9 and 18/15
1st number: 3 0/9, 2nd number: 1 3/15
27/9 + 18/15 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
27/9 = 27 × 5/9 × 5 = 135/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
18/15 = 18 × 3/15 × 3 = 54/45 - Add the two like fractions:
135/45 + 54/45 = 135 + 54/45 = 189/45 - 189/45 simplified gives 21/5
- So, 27/9 + 18/15 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/9+18/15 27/9+36/15 27/18+18/15 27/9+18/30 81/9+18/15 27/9+54/15 27/9+18/45 27/9+90/15 27/45+18/15 27/9+18/75 27/63+18/15