Question

During Christmas a book store sold 48books. If the ratio of books to bookmarkssold was 8:2, how many bookmarks didthe store sell?

Answer 1

By the ratio of two numbers we mean that is a division which results in the same value. It is, if the ratio of the number of books to the bookmarks sold at the same period is 8:2, it means the division of the number of books divided by the bookmarks sold mus be equal to 8:2 = 4.

We already know the number of books, that is 48, but we do not know the number of bookmarks, so we call it x. And we have the following:

`(48)/(x)=4`

To isolate x and find its value, we multiply both sides by x, and divide, also both sides, by 4. It is:

`\begin{gathered} ((48)/(x)* x)/(4)=(4* x)/(4) \\ \\ (48)/(4)=x \\ \\ x=12 \end{gathered}`

From the presented calculation, we can say that the amount of bookmarks sold during Christmas was 12.