Question

a company that makes hair care products had people try a new shampoo. Of the 300 people, 90 had a mild allergic reaction. What percent of the people had a mild allergic reaction?

Answer 1

The expression for percentage is

`Percentage=\frac{\text{Amount whose percentage has to be calculated}}{Total\text{ amount}}*100`

Here out of 300 people, 90 people have allergic

`\begin{gathered} \text{Percentage =}\frac{Number\text{ of people have mild allergic}}{Total\text{ number of people used Shampoo}}*100 \\ \text{Percentage}=(90)/(300)*100 \\ \text{Percentage}=(90)/(3) \\ \text{Percentage}=30 \end{gathered}`

The percentage of peoplw who have mild allegric is 30%

Answer : 30%