Add 28/20 and 3/9
1st number: 1 8/20, 2nd number: 3/9
28/20 + 3/9 is 26/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
28/20 = 28 × 9/20 × 9 = 252/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
3/9 = 3 × 20/9 × 20 = 60/180 - Add the two like fractions:
252/180 + 60/180 = 252 + 60/180 = 312/180 - 312/180 simplified gives 26/15
- So, 28/20 + 3/9 = 26/15
In mixed form: 111/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20+3/9 28/20+6/9 28/40+3/9 28/20+3/18 84/20+3/9 28/60+3/9 28/20+3/27 28/20+15/9 28/20+3/45 28/20+21/9 28/20+3/63