Add 6/18 and 42/8, Solve 6/18 + 5 2/8 as a fraction

Add 6/18 and 42/8

1^st number: 6/18, 2^nd number: 5 2/8

6/18 + 42/8 is 67/12.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 18 × 4 = 72,
6/18 = 6 × 4/18 × 4 = 24/72
Likewise, for the 2nd fraction, since 8 × 9 = 72,
42/8 = 42 × 9/8 × 9 = 378/72
Add the two like fractions:
24/72 + 378/72 = 24 + 378/72 = 402/72
402/72 simplified gives 67/12
So, 6/18 + 42/8 = 67/12
In mixed form: 57/12

MathStep (Works offline)

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