SOLUTION: Fast Food. If four out of five doctors prefer fast food, then at a convention of 445 doctors, how many prefer fast food?

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Question 146756: Fast Food. If four out of five doctors prefer fast food, then at a convention of 445 doctors, how many prefer fast food?

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
This is a problem in "proportions".
.
Let x = doctors preferring fast food
then
4/5 = x/445
(4/5)445 = x
4(89) = x
356 = x