1. The first figure is the cost price and the second figure is the selling price. Calculate the percentage profit or loss in each case.
a) $20, $25 b) $400, $500 c) $60, $54 d) $9000, $10 800 e) $460, $598 f) $512, $550.40 g) $45, $39.60 h) 50c, 23c can someone explain this question to me ?? I have the solution but I couldn't understand how to solve it ...
