Add 28/9 and 30/20
1st number: 3 1/9, 2nd number: 1 10/20
28/9 + 30/20 is 83/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
28/9 = 28 × 20/9 × 20 = 560/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Add the two like fractions:
560/180 + 270/180 = 560 + 270/180 = 830/180 - 830/180 simplified gives 83/18
- So, 28/9 + 30/20 = 83/18
In mixed form: 411/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/9+30/20 28/9+60/20 28/18+30/20 28/9+30/40 84/9+30/20 28/9+90/20 28/27+30/20 28/9+30/60 28/45+30/20 28/63+30/20