Question

Emma decided to bake cookies. Her recipe called for 3 cups of sugar and 4 cups of chocolate chips for 2 batches of cookies. If she made 12 batches of cookies, how many cups of chocolate chips does Emma need?

Answer 1

24 cups of chocolate chips

Explanation:

Since this is a proportion problem and there is only one variable that needs to be found we can use the Rule of three to solve this problem. To do this we simply divide the diagonal values by the last value which would ultimately give us the value of the variable in question, like so...

4 cups of chocolate chips <=======> 2 batches of cookies

x cups of chocolate chips <=======> 12 batches of cookies

(4 * 12) / 2 = 24 cups of chocolate chips

Therefore, we can now see that we would need a total of 24 cups of chocolate chips to make the 12 batches of cookies.