Let m, n, p, and q represent nonzero positive integers. Find a number in terms of m, n, p, and q that is halfway between m/n and p/q.

Question

It is asking for the formula for how to solve the word problem. 

Answer 1

The number half-way between would be the mean (or average):

[(m/n) + (p/q)] / 2

[(mq + pn) / nq] / 2     LCD

(mq + pn) / 2nq