Add 40/18 and 8/42, Solve 2 4/18 + 8/42 as a fraction

Add 40/18 and 8/42

1^st number: 2 4/18, 2^nd number: 8/42

40/18 + 8/42 is 152/63.

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,
40/18 = 40 × 7/18 × 7 = 280/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
8/42 = 8 × 3/42 × 3 = 24/126
Add the two like fractions:
280/126 + 24/126 = 280 + 24/126 = 304/126
304/126 simplified gives 152/63
So, 40/18 + 8/42 = 152/63
In mixed form: 226/63

MathStep (Works offline)

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