Simon gets a discount of 25 % on purchasing 100 VCD's from...

Simon gets a discount of $25 \%$ on purchasing 100 VCD's from Samuel. He sells them and makes a profit equal to the undiscounted price of 25 VCD's. What is the gain percentage?
(A) $25 \%$
(B) $30 \%$
(C) $66.66 \%$
(D) $33.33 \%$

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Key Concepts

Profit and Gain Percentage

Profit is the surplus remaining after subtracting the cost price from the selling price, and the profit percentage (or gain percentage) is a measure of profitability calculated by comparing the profit to the cost price. It provides insight into the efficiency and success of a sale.

Cost Price and Selling Price

The cost price is the amount paid to buy an item, often adjusted for discounts, while the selling price is the revenue received from selling the item. Analyzing the difference between these two figures is crucial for determining profit or loss.

Discount

A discount is a reduction applied to the marked price of an item, typically expressed as a percentage. It decreases the amount a buyer pays, thereby lowering the effective cost price relative to the list or marked price.

Percentage Calculations

Percentage calculations are a fundamental tool used to convert ratios into comparative figures, making it easier to assess discounts, profits, and overall performance in financial transactions. These calculations help in standardizing comparisons across different financial metrics.

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