Add 45/9 and 20/12
1st number: 5 0/9, 2nd number: 1 8/12
45/9 + 20/12 is 20/3.
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,
45/9 = 45 × 4/9 × 4 = 180/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
20/12 = 20 × 3/12 × 3 = 60/36 - Add the two like fractions:
180/36 + 60/36 = 180 + 60/36 = 240/36 - 240/36 simplified gives 20/3
- So, 45/9 + 20/12 = 20/3
In mixed form: 62/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/9+20/12 45/9+40/12 45/18+20/12 45/9+20/24 45/9+60/12 45/27+20/12 45/9+20/36 45/9+20/60 45/63+20/12 45/9+20/84