Add 9/30 and 18/12, Solve 9/30 + 1 6/12 as a fraction

Add 9/30 and 18/12

1^st number: 9/30, 2^nd number: 1 6/12

9/30 + 18/12 is 9/5.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 30 × 2 = 60,
9/30 = 9 × 2/30 × 2 = 18/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
18/12 = 18 × 5/12 × 5 = 90/60
Add the two like fractions:
18/60 + 90/60 = 18 + 90/60 = 108/60
108/60 simplified gives 9/5
So, 9/30 + 18/12 = 9/5
In mixed form: 14/5

MathStep (Works offline)

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