a company that makes hair-care products had 3000 people try a new shampoo. Of the 3000 people, 9 had a mild allergic reaction. W
hat percent of people had a mild allergic reaction?
1 answer:
Answer: Hello mate!
We know that out of 3000 people, 9 had a alergic reaction.
in this case our 100% is 3000, and we want to know what percentage is equivalent to those 9 that had a mild allergic reaction.
here we can use the rule of 3, this is:
if 3000 is equivalent to 100%, then 9 is equivalent to:
(9/3000)*100% = 0.3%
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