Add 12/9 and 80/12
1st number: 1 3/9, 2nd number: 6 8/12
12/9 + 80/12 is 8/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
12/9 = 12 × 4/9 × 4 = 48/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
80/12 = 80 × 3/12 × 3 = 240/36 - Add the two like fractions:
48/36 + 240/36 = 48 + 240/36 = 288/36 - 288/36 simplified gives 8/1
- So, 12/9 + 80/12 = 8/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9+80/12 12/18+80/12 12/9+80/24 36/9+80/12 12/27+80/12 12/9+80/36 60/9+80/12 12/45+80/12 12/9+80/60 84/9+80/12 12/63+80/12 12/9+80/84