Add 28/45 and 15/18
28/45 + 15/18 is 131/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
28/45 = 28 × 2/45 × 2 = 56/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Add the two like fractions:
56/90 + 75/90 = 56 + 75/90 = 131/90 - So, 28/45 + 15/18 = 131/90
In mixed form: 141/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/45+15/18 28/45+30/18 28/90+15/18 28/45+15/36 84/45+15/18 28/45+45/18 28/45+15/54 28/45+75/18 28/45+15/90