Question

At the start of the 2020 school year, Edison High School received a shipment of 72 cases of books with 20books in each case. Of the total, 10% were math books. How many books are not math books?

Answer 1

Let be "n" the number of books that are not math books.

According to the information given in the exercise, each case has 20 books and there are 72 cases. Knowing this, you can calculate the total number of books:

`Total=(20\text{ }books)(72)=1440\text{ }books`

You know that the 10% of this total were math books. Therefore, you can set up the following equation (remember that a percent can be written as a Decimal number by dividing it by 100):

`n=(1440)((10)/(100))`

Evaluating, you get:

`n=144`

The answer is: 144 books are not math books.