Question

A cosmetic company tested a new lotion. Of the 2,500 people tested, 15 had an allergic reaction. What percent of the people tested had an allergic reaction to the new lotion?

Answer 1

15/2500 *100 = 0.6%

0.6% is the answer .

Answer 2

People had an allergic reaction = 0.6%

Explanation:

Cosmetic company has tested a new lotion on = 2500 people

Allergic reactions were observed in the persons = 15

As we know to calculate the percentage we apply the formula

Percentage people had an allergic reaction

=
`\frac{\text{Number of persons having allergic reactions}}{\text{Total number of persons under test}}`

=
`(15)/(2500)* 100`

= 0.6%

People had an allergic reaction = 0.6%