I'm not asking for a direct answer, all I really want is a thorough explanation on how to solve this problem. I would really appreciate it, thank you.

You discover a chemical reaction that produces 1 moles of valuable propane for every 8 moles of carbon supplied.

Essentially, this is an exchange rate of 1 moles of propane for every 8 moles of carbon.

If you have 1.3 moles of carbon, how many moles of propane can you produce using this reaction?