Add 4/9 and 80/42, Solve 4/9 + 1 38/42 as a fraction

Add 4/9 and 80/42

1^st number: 4/9, 2^nd number: 1 38/42

4/9 + 80/42 is 148/63.

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,
4/9 = 4 × 14/9 × 14 = 56/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
80/42 = 80 × 3/42 × 3 = 240/126
Add the two like fractions:
56/126 + 240/126 = 56 + 240/126 = 296/126
296/126 simplified gives 148/63
So, 4/9 + 80/42 = 148/63
In mixed form: 222/63

MathStep (Works offline)

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