Add 12/20 and 10/9
1st number: 12/20, 2nd number: 1 1/9
12/20 + 10/9 is 77/45.
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,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
10/9 = 10 × 20/9 × 20 = 200/180 - Add the two like fractions:
108/180 + 200/180 = 108 + 200/180 = 308/180 - 308/180 simplified gives 77/45
- So, 12/20 + 10/9 = 77/45
In mixed form: 132/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+10/9 12/20+20/9 12/40+10/9 12/20+10/18 36/20+10/9 12/20+30/9 12/60+10/9 12/20+10/27 60/20+10/9 12/20+50/9 12/20+10/45 84/20+10/9 12/20+70/9 12/20+10/63