Add 20/9 and 28/90
1st number: 2 2/9, 2nd number: 28/90
20/9 + 28/90 is 38/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
20/9 = 20 × 10/9 × 10 = 200/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
28/90 = 28 × 1/90 × 1 = 28/90 - Add the two like fractions:
200/90 + 28/90 = 200 + 28/90 = 228/90 - 228/90 simplified gives 38/15
- So, 20/9 + 28/90 = 38/15
In mixed form: 28/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9+28/90 20/9+56/90 20/18+28/90 60/9+28/90 20/9+84/90 20/27+28/90 20/45+28/90 20/63+28/90