Question

If 7 out of 10 people brush thier teeth every night, which of the following represents the percent of people who do not brush thier teeth every night?

Answer 1

Answer: 30 percent of people who do not brush theit teeth every night.

Explanation:

Given : 7 out of 10 people brush their teeth every night.

That means 3 out of 10 people do not brush their teeth every night. (7-10=3)

Now, the percent of people who do not brush their teeth every night =
`\frac{\text{Number of people do not brush their teeth}}{\text{Total people}}*100\%`

`=(3)/(10)*100\%\\\\=30\%`

Hence, 30 percent of people who do not brush theit teeth every night.