Question

If the sale price of 20 articles is equal to the cost of 23 articles, the loss or profit percentage is revealed.

Answer 1

let the selling price be y and cost price be x
$20y = 23x$
selling price of one item is
$\frac{23}{20} x$
profit is
$((\frac{23}{20} x \: - x) \div x) \times 100 = 15\%$