Question

a recipe calls for three cups of cheese to make nachos for six people .how much cheese is needed to make nachos for two dozen people?

Answer 1

24ppl x 3cups = 12 cups of cheese

Answer 2

First, let's figure out how many cups of cheese we need for one dozen people. 
There are 12 people in one dozen. 

3 cups of cheese  = x cups of cheese
    6 people                     12 people


that means we will need 6 cups of cheese for 12 people, or one dozen. 

However, we want to make nachos for two dozen people. 

6 cups of cheese for one dozen x 2 dozen = 12 cups of cheese

You need 12 cups of cheese to make nachos for two dozen people.