Final answer:
To return the LCD television to its original price during the stocktake sales, a percentage mark-up of 15% is required.
Step-by-step explanation:
To calculate the percentage mark-up required for the LCD television to return to its original price, we can use the concept of finding the original price after a discount.
Since the television is discounted by 15%, the price after the discount will be 85% of the original price. Therefore, if we divide the discounted price by 0.85, we will find the original price.
Example:
If the discounted price is $850, then the original price can be calculated as follows:
$850 / 0.85 = $1,000
This means that a percentage mark-up of 15% is needed for the television to return to its original price.