Add 30/18 and 2/42, Solve 1 12/18 + 2/42 as a fraction

Add 30/18 and 2/42

1^st number: 1 12/18, 2^nd number: 2/42

30/18 + 2/42 is 12/7.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
2/42 = 2 × 3/42 × 3 = 6/126
Add the two like fractions:
210/126 + 6/126 = 210 + 6/126 = 216/126
216/126 simplified gives 12/7
So, 30/18 + 2/42 = 12/7
In mixed form: 15/7

MathStep (Works offline)

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