If you have $3.00, and each candy is $0.20, you divide 3 by 0.2. Once you do that, you should get the answer 15. This means that with $3.00, you can by 15 $0.20 candies.
Since there are 100 cents in a dollar, you can buy 5 candies per dollar. To find out how much candies you can buy with three dollars, you do 5 times 3. Which equal 15.
