Add 15/9 and 30/20
1st number: 1 6/9, 2nd number: 1 10/20
15/9 + 30/20 is 19/6.
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,
15/9 = 15 × 20/9 × 20 = 300/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Add the two like fractions:
300/180 + 270/180 = 300 + 270/180 = 570/180 - 570/180 simplified gives 19/6
- So, 15/9 + 30/20 = 19/6
In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9+30/20 15/9+60/20 15/18+30/20 15/9+30/40 45/9+30/20 15/9+90/20 15/27+30/20 15/9+30/60 75/9+30/20 15/45+30/20 15/63+30/20