Question

What is 4/7 + 8/15 =

Answer 1

You need to bring them to a common denominator by multiplying the numbers below and above the line by the denominator of the other:

$4*15/(7*15)$ and the other one will be $8*7/(15*7)$

when we calculate we have

60/105 and the other number is 56/106.

now we can add them:
(60+56)/105=116/105= 1 and 11/105 or 1.104....