SOLUTION: The selling price of a calculator is $115. If the mark-up is 25% of the dealer's cost, what is the dealer's cost?

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Question 492028: The selling price of a calculator is $115. If the mark-up is 25% of the dealer's cost, what is the dealer's cost?
Answer by nerdybill(6958) About Me  (Show Source):
You can put this solution on YOUR website!
The selling price of a calculator is $115. If the mark-up is 25% of the dealer's cost, what is the dealer's cost?
Let d = dealer's cost
then
d + .25d = 115
d(1+.15) = 115
d(1.15) = 115
d = $100