Add 20/27 and 18/12
1st number: 20/27, 2nd number: 1 6/12
20/27 + 18/12 is 121/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 12 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 27 × 4 = 108,
20/27 = 20 × 4/27 × 4 = 80/108 - Likewise, for the 2nd fraction, since 12 × 9 = 108,
18/12 = 18 × 9/12 × 9 = 162/108 - Add the two like fractions:
80/108 + 162/108 = 80 + 162/108 = 242/108 - 242/108 simplified gives 121/54
- So, 20/27 + 18/12 = 121/54
In mixed form: 213/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27+18/12 20/27+36/12 20/54+18/12 20/27+18/24 60/27+18/12 20/27+54/12 20/81+18/12 20/27+18/36 20/27+90/12 20/27+18/60 20/27+18/84