Add 20/12 and 10/9
1st number: 1 8/12, 2nd number: 1 1/9
20/12 + 10/9 is 25/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
20/12 = 20 × 3/12 × 3 = 60/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
10/9 = 10 × 4/9 × 4 = 40/36 - Add the two like fractions:
60/36 + 40/36 = 60 + 40/36 = 100/36 - 100/36 simplified gives 25/9
- So, 20/12 + 10/9 = 25/9
In mixed form: 27/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12+10/9 20/12+20/9 20/24+10/9 20/12+10/18 60/12+10/9 20/12+30/9 20/36+10/9 20/12+10/27 20/12+50/9 20/60+10/9 20/12+10/45 20/12+70/9 20/84+10/9 20/12+10/63