Question

If the selling price of 25CDs is the same as the cost price of 30CDs,find the profit of loss per cent.​

Answer 1

Answer:

PROFIT PERCENT IS 20 PERCENT.

Step-by-step explanation:

$let \: cp \: of \: one \: cd = x \\ \\ cp \: of \: 30 \: cd = 30x \\ \\ sp \: of \: 25 \: cd = 30x \\ \\ \\ \\ sp \: of \: 30 \: cd = \frac{30x}{25} \times 30 = \frac{900x}{25} \\ \\ = 36x \\ \\ profit \: \: \: \: \: percent = \frac{36x - 30x}{30x} \times 100 \\ \\ = \frac{6x}{30x} \times 100 \\ \\ = \frac{600x}{30x} \\ \\ = 20 \: percent.$