Add 84/8 and 5/9, Solve 10 4/8 + 5/9 as a fraction

Add 84/8 and 5/9

1^st number: 10 4/8, 2^nd number: 5/9

84/8 + 5/9 is 199/18.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 8 × 9 = 72,
84/8 = 84 × 9/8 × 9 = 756/72
Likewise, for the 2nd fraction, since 9 × 8 = 72,
5/9 = 5 × 8/9 × 8 = 40/72
Add the two like fractions:
756/72 + 40/72 = 756 + 40/72 = 796/72
796/72 simplified gives 199/18
So, 84/8 + 5/9 = 199/18
In mixed form: 111/18

MathStep (Works offline)

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