Add 12/9 and 84/45
1st number: 1 3/9, 2nd number: 1 39/45
12/9 + 84/45 is 16/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
12/9 = 12 × 5/9 × 5 = 60/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
84/45 = 84 × 1/45 × 1 = 84/45 - Add the two like fractions:
60/45 + 84/45 = 60 + 84/45 = 144/45 - 144/45 simplified gives 16/5
- So, 12/9 + 84/45 = 16/5
In mixed form: 31/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9+84/45 12/18+84/45 12/9+84/90 36/9+84/45 12/27+84/45 60/9+84/45 12/45+84/45 84/9+84/45 12/63+84/45