A survey found that 12 out of every 15 people in the United states prefer eating at a restaurant over cooking at home. if 400 people selected eating at a restaurant on the survey, how many people took the survey ...

On a certain survey it says:

12 out 15 people in the United States prefer eating at the restaurant rather than home.

To know how many percent is this.

=> 12 / 15

=> 0.8 which is also 80%

Now, the 80% of the those people in the survey is 400.

Find the total number of people who took the survey.

Since we already have the 80%, we need to find the number of 20%

=> 400 x 20%

=> 400 x. 20

=> 80

=> 400 + 80

=> 480 = > the total number of people who took the survey