Question

How do I add 1/3 + 1/4

Answer 1

First, find the least common multiple of 3 and 4, the denominators. You find that lcm(3,4)=12.

So, we get $\frac{1}{3}*\frac{4}{4}+\frac{1}{4}*\frac{3}{3}=\frac{7}{12}$

This is because the denominator must the a multiple of the lcm in order to add the fractions properly.