Mathematics, 23.02.2021 01:30 SmolBeanPotato

A skin-care company had 1,500 people try a new acne cream. Nine people had a mild allergic reaction. The formula is then improved and those 1,500 people try the new cream. Only 4 of them had a mild allergic reaction. What is the percent decrease in number of allergic reactions? 0.267%
0.6%
55.6%
44.4%

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A skin-care company had 1,500 people try a new acne cream. Nine people had a mild allergic reaction....

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