Add 18/9 and 54/12, Solve 2 0/9 + 4 6/12 as a fraction

Add 18/9 and 54/12

1^st number: 2 0/9, 2^nd number: 4 6/12

18/9 + 54/12 is 13/2.

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,
18/9 = 18 × 4/9 × 4 = 72/36
Likewise, for the 2nd fraction, since 12 × 3 = 36,
54/12 = 54 × 3/12 × 3 = 162/36
Add the two like fractions:
72/36 + 162/36 = 72 + 162/36 = 234/36
234/36 simplified gives 13/2
So, 18/9 + 54/12 = 13/2
In mixed form: 61/2

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad