Math

We are currently studying "earning money" for math. I read this sentence:

When a store claculates its profit as a percentage of its cost price the profit is always bigger than the profit calculated as a percentage of the selling price.

What does it mean and please give me an example.

Thank you :)

asked by Jason
  1. cost: $10
    selling price: $15
    profit: $5

    profit/cost = 5/10 = 50%
    profit/sellprice = 5/15 = 33%

    assuming s > c
    ps > pc
    divide by sc:
    p/c > p/s

    posted by Steve

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