Anna has some decorative pieces worth Rs. 16000. She decided to sell them. She first sold half of the pieces and made a profit of 40%. Now, at what percentage must she sell the remaining half, so that she gets a profit of 80% on the whole?

Assume the cost price of the half share is Rs. 8000 and the target total selling price for an 80 percent total profit is 16000 multiplied by 1.80, equaling Rs. 28800. The first half was sold at a 40 percent profit, yielding 8000 multiplied by 1.40, which is Rs. 11200. This means the remaining half must sell for 28800 minus 11200, which is Rs. 17600. The required profit percentage on the remaining half is 17600 minus 8000 divided by 8000 multiplied by 100, resulting in 120 percent.

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