Add 12/18 and 42/36, Solve 12/18 + 1 6/36 as a fraction

Add 12/18 and 42/36

1^st number: 12/18, 2^nd number: 1 6/36

12/18 + 42/36 is 11/6.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 36 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 18 × 2 = 36,
12/18 = 12 × 2/18 × 2 = 24/36
Likewise, for the 2nd fraction, since 36 × 1 = 36,
42/36 = 42 × 1/36 × 1 = 42/36
Add the two like fractions:
24/36 + 42/36 = 24 + 42/36 = 66/36
66/36 simplified gives 11/6
So, 12/18 + 42/36 = 11/6
In mixed form: 15/6

MathStep (Works offline)

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