SOLUTION: If the sales tax on a $60 purchase is $3.90, what would it be on a $240 purchase?

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Question 1134142: If the sales tax on a $60 purchase is $3.90, what would it be on a $240 purchase?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
60/240=3.90/x
60x=936
x=$15.60
60 is 1/4 of 240 so sales tax at 240 is four times that of 60