1,500 people were surveyed and 30 out of every 100 people surveyed have freckles. Based on the
results of this survey, how many people do not
have freckles?

So since 1,500 people were surveyed and 30/100 have freckles, you would multiply both sides by 15 to get 450 and 1,500. So that means 450 people who took the survey have freckles i believe, so then you would subtract 1,500-450 and you are left with 1,050. The answer should be 1,050.

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.