Hi there, pddior95:, I'd like to welcome you to the Chemical Forums, but I'd like to ask you to read our
Forum Rules{click}. You agreed to these rules as a condition of signing up for our forum, and they apply to you, whether you agree with them or not, or even if you're unaware of them.
We want to see you begin to try to solve this problem for yourself. Its not likely you were given this assignment with no support at all from an instructor. They probably gave you something like a step-by-step plan to solve these sorts of problems.
Consider this: I have a 15 coin stack of coins, every 2 nickels in the stack has 3 pennies. How many nickels do I have?
This is the sort of thing you can use to help you understand these sorts of problems.