The question asks for the percentage above the cost price (CP) a shopkeeper should mark goods (Marked Price, MP) to achieve a specific profit (Gain) after offering a discount.
First, determine the Selling Price (SP) needed to achieve the desired gain.
Using the formula $SP = CP \times (1 + \frac{Gain\%}{100})$:
$SP = 100 \times (1 + \frac{12}{100})$ $SP = 100 \times (1 + 0.12)$ $SP = 100 \times 1.12$ $SP = 112$Next, find the Marked Price (MP) based on the Selling Price (SP) and the discount percentage.
The formula relating SP, MP, and Discount is $SP = MP \times (1 - \frac{Discount\%}{100})$.
$112 = MP \times (1 - \frac{25}{100})$ $112 = MP \times (1 - 0.25)$ $112 = MP \times 0.75$ $MP = \frac{112}{0.75}$ $MP = \frac{112}{3/4}$ $MP = 112 \times \frac{4}{3}$ $MP = \frac{448}{3}$Now, calculate the percentage markup above the cost price.
Markup Percentage $= \frac{MP - CP}{CP} \times 100$
Markup Percentage $= \frac{\frac{448}{3} - 100}{100} \times 100$ Markup Percentage $= (\frac{448}{3} - \frac{300}{3}) \%$ Markup Percentage $= \frac{148}{3} \%$ Markup Percentage $= 49 \frac{1}{3}\%$Therefore, the shopkeeper should mark the goods $49 \frac{1}{3}\%$ above the cost price.
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