Add 30/20 and 12/9
1st number: 1 10/20, 2nd number: 1 3/9
30/20 + 12/9 is 17/6.
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,
30/20 = 30 × 9/20 × 9 = 270/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
12/9 = 12 × 20/9 × 20 = 240/180 - Add the two like fractions:
270/180 + 240/180 = 270 + 240/180 = 510/180 - 510/180 simplified gives 17/6
- So, 30/20 + 12/9 = 17/6
In mixed form: 25/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+12/9 30/20+24/9 30/40+12/9 30/20+12/18 90/20+12/9 30/20+36/9 30/60+12/9 30/20+12/27 30/20+60/9 30/20+12/45 30/20+84/9 30/20+12/63