Add 7/18 and 28/45
7/18 + 28/45 is 91/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
7/18 = 7 × 5/18 × 5 = 35/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
28/45 = 28 × 2/45 × 2 = 56/90 - Add the two like fractions:
35/90 + 56/90 = 35 + 56/90 = 91/90 - So, 7/18 + 28/45 = 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: 14/18+28/45 7/18+56/45 7/36+28/45 7/18+28/90 21/18+28/45 7/18+84/45 7/54+28/45 35/18+28/45 7/90+28/45 49/18+28/45