Math CentralQuandaries & Queries


Question from aswathi, a student:

if the ratio of cost price and selling price of an article is be as 10:11, the percentage of profit is

The selling price is equal to the profit added to the cost:

Selling Price = Cost + Profit

If the ratio of cost to selling price is 10 : 11 (or 1 : 1.1) then

Selling Price = 1.1 × Cost

If you substitute this back into the first equation, can you determine the percentage profit?


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