Add 20/15 and 28/9
1st number: 1 5/15, 2nd number: 3 1/9
20/15 + 28/9 is 40/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
20/15 = 20 × 3/15 × 3 = 60/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
28/9 = 28 × 5/9 × 5 = 140/45 - Add the two like fractions:
60/45 + 140/45 = 60 + 140/45 = 200/45 - 200/45 simplified gives 40/9
- So, 20/15 + 28/9 = 40/9
In mixed form: 44/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+28/9 20/15+56/9 20/30+28/9 20/15+28/18 60/15+28/9 20/15+84/9 20/45+28/9 20/15+28/27 20/75+28/9 20/15+28/45 20/15+28/63