Question

A man buys eggs at RS 9.60 per dozen and sell 20 eggs for RS 18 what is his gain or loss percen?​

Answer 1

Percentage Gain = 12.5%

Explanation:

Given

`Cost\ Prize = 9.60` per dozen

`Selling\ Price = 18` per 20

Required

Determine the percentage gain or loss

First, we have to calculate the unit cost price and the unit selling price.

If a dozen costs 9.60

Then 1 costs

`Cost = 9.60/12`

`Cost = 0.80`

If he sells 20 for 18

Then he sells 1 for:

`Sell = 18/20`

`Sell = 0.9`

The percentage change is then calculated as:

`\%Change = (Sell - Cost)/(Cost) * 100\%`

`\%Change = (0.9 - 0.8)/(0.8) * 100\%`

`\%Change = (0.1)/(0.8) * 100\%`

`\%Change = (0.1 * 100\%)/(0.8)`

`\%Change = (10\%)/(0.8)`

`\%Change = 12.5\%`

Because the percentage change is positive, then he made a gain.

Hence:

Percentage Gain = 12.5%