Government Economists of a Developing Country Determined That the Purchase

Government economists of a developing country determined that the purchase of imported perfume is related to a proposed "luxury tax" by the formula , where N (x) measures the percentage of normal consumption of perfume when a "luxury tax" of x% is imposed on it. Find the rate of change of N(x) for a tax of 110%.

A) - 1.13
B) - 1.54
C) - 0.25
D) - 0.27