Add 28/3 and 80/18, Solve 9 1/3 + 4 8/18 as a fraction

Add 28/3 and 80/18

1^st number: 9 1/3, 2^nd number: 4 8/18

28/3 + 80/18 is 124/9.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 18 is 18

Next, find the equivalent fraction of both fractional numbers with denominator 18
For the 1st fraction, since 3 × 6 = 18,
28/3 = 28 × 6/3 × 6 = 168/18
Likewise, for the 2nd fraction, since 18 × 1 = 18,
80/18 = 80 × 1/18 × 1 = 80/18
Add the two like fractions:
168/18 + 80/18 = 168 + 80/18 = 248/18
248/18 simplified gives 124/9
So, 28/3 + 80/18 = 124/9
In mixed form: 137/9

MathStep (Works offline)

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