Add 28/9 and 20/15
1st number: 3 1/9, 2nd number: 1 5/15
28/9 + 20/15 is 40/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
28/9 = 28 × 5/9 × 5 = 140/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
20/15 = 20 × 3/15 × 3 = 60/45 - Add the two like fractions:
140/45 + 60/45 = 140 + 60/45 = 200/45 - 200/45 simplified gives 40/9
- So, 28/9 + 20/15 = 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: 56/9+20/15 28/9+40/15 28/18+20/15 28/9+20/30 84/9+20/15 28/9+60/15 28/27+20/15 28/9+20/45 28/45+20/15 28/9+20/75 28/63+20/15