Question

Action movies make up 85% of Devon's movie collection. If he has 20 movies,how many action movies are in Devon's collection?

Answer 1

The answer is 17, because you know it’s going to be most of it, so you do 20 times .85 on your calculator, and you have your answer! :) 

Answer 2

Method 1

We can find the number of Devon's movie collection by multiplying its percentage by the number of Action movies. That is;

Number of Devon's movie collection
`= (85)/(100) * 20=(85)/(5) =17`

Method 2

We can also use ratio and proportion. According to the question, out of every 100 Action movies 85 are Devon's Movie collection. This means,

Action movies Devon's collection

100 85

20
`x`

If 100 corresponds to 85, then 20 will correspond to a less value than 85. If less more divides,Hence,

`x=(85 * 20)/(100)=17`.

Therefore he has 17 movies that are in Devon's collection.