Aparna changes the marked price of an item to 50% above its C.P. What % of discount allowed in approximately to gain 10%?

As per the given data,

Let the cost price be Rs. 100, then marked price = Rs.150

Given required gain = 10%

∴ Selling price = Rs. 110

We know that discount = Marked price - selling price

So, discount = 150 - 110 = 40

Discount percentage = 40/150 × 100 = 26.66% (nearly 27%)