Add 60/80 and 35/81, Solve 60/80 + 35/81 as a fraction

Add 60/80 and 35/81

60/80 + 35/81 is 383/324.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480

Next, find the equivalent fraction of both fractional numbers with denominator 6480
For the 1st fraction, since 80 × 81 = 6480,
60/80 = 60 × 81/80 × 81 = 4860/6480
Likewise, for the 2nd fraction, since 81 × 80 = 6480,
35/81 = 35 × 80/81 × 80 = 2800/6480
Add the two like fractions:
4860/6480 + 2800/6480 = 4860 + 2800/6480 = 7660/6480
7660/6480 simplified gives 383/324
So, 60/80 + 35/81 = 383/324
In mixed form: 159/324

MathStep (Works offline)

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