Add 18/9 and 15/42, Solve 2 0/9 + 15/42 as a fraction

Add 18/9 and 15/42

1^st number: 2 0/9, 2^nd number: 15/42

18/9 + 15/42 is 33/14.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 9 × 14 = 126,
18/9 = 18 × 14/9 × 14 = 252/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
15/42 = 15 × 3/42 × 3 = 45/126
Add the two like fractions:
252/126 + 45/126 = 252 + 45/126 = 297/126
297/126 simplified gives 33/14
So, 18/9 + 15/42 = 33/14
In mixed form: 25/14

MathStep (Works offline)

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