SOLUTION: while watching TV from 7 to 8 PM you count 20 commercials each 30 seconds long, what is nearest percentage of the hour taken by the Commercials ?

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Question 980306: while watching TV from 7 to 8 PM you count 20 commercials each 30 seconds long, what is nearest percentage of the hour taken by the Commercials ?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
%2820%2A%281%2F2%29%29%2F60, the fraction as commercials.