Question

A certain shade of pink is created by adding 3 cups of Red paint to 7 cups of white paint. How many cups of red paint should be added to 1 cup of white paint?

Answer 1

three sevenths of a cup;
`(3)/(7)` of a cup; 0.43 of a cup

Explanation:

The ratio of red paint to white paint is 3:7,

You could write this as a fraction too, 3/7.

If there is 1 cup of white paint then that means 3/7 = ?/1

7 divided by 1 equals 7, what you do to the bottom you must do to the top. 3 divided by 7 equals 3/7 of a cup, or 0.43 of a cup.

`(3)/(7)` =
`(?)/(1)`

7 ÷ ? = 1

7 ÷ 7 = 1

3 ÷ 7 =
`(3)/(7)` or 0.43

`(3)/(7)` =
`(0.43)/(1)`