SOLUTION
Given the question, the better deal can be known by getting the price of a unit of ticket for both deals and choosing the better one.
For 5 tickets for $12.50, we divide the amount by the units gotten
For 8 tickets for $12.16, we divide the amount by the units gotten
Hence, the better deal will be the deal with the smallest price per unit of ticket which is 8 tickets for $12.16