Add 6/80 and 84/9, Solve 6/80 + 9 3/9 as a fraction

Add 6/80 and 84/9

1^st number: 6/80, 2^nd number: 9 3/9

6/80 + 84/9 is 1129/120.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 80 × 9 = 720,
6/80 = 6 × 9/80 × 9 = 54/720
Likewise, for the 2nd fraction, since 9 × 80 = 720,
84/9 = 84 × 80/9 × 80 = 6720/720
Add the two like fractions:
54/720 + 6720/720 = 54 + 6720/720 = 6774/720
6774/720 simplified gives 1129/120
So, 6/80 + 84/9 = 1129/120
In mixed form: 949/120

MathStep (Works offline)

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