Add 8/45 and 15/18
8/45 + 15/18 is 91/90.
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,
8/45 = 8 × 2/45 × 2 = 16/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Add the two like fractions:
16/90 + 75/90 = 16 + 75/90 = 91/90 - So, 8/45 + 15/18 = 91/90
In mixed form: 11/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/45+15/18 8/45+30/18 8/90+15/18 8/45+15/36 24/45+15/18 8/45+45/18 8/45+15/54 40/45+15/18 8/45+75/18 8/45+15/90 56/45+15/18