Add 81/6 and 10/80, Solve 13 3/6 + 10/80 as a fraction

Add 81/6 and 10/80

1^st number: 13 3/6, 2^nd number: 10/80

81/6 + 10/80 is 109/8.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 80 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 6 × 40 = 240,
81/6 = 81 × 40/6 × 40 = 3240/240
Likewise, for the 2nd fraction, since 80 × 3 = 240,
10/80 = 10 × 3/80 × 3 = 30/240
Add the two like fractions:
3240/240 + 30/240 = 3240 + 30/240 = 3270/240
3270/240 simplified gives 109/8
So, 81/6 + 10/80 = 109/8
In mixed form: 135/8

MathStep (Works offline)

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