Answer:
d. 5% decrease
Explanation:
You want the change in price of coins bought for x dollars and sold for 0.95x dollars.
Change
The percent change in price is given by ...
% change = ((new price)/(old price) -1) × 100%
% change = (0.95x/x -1) × 100% = (0.95 -1) × 100%
% change = -0.05 × 100% = -5%
The change in the price of the coins is described as a 5% decrease.
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