Question 43If the price of an article is increased by per cent $p,$ then the decrease in per cent of sales must not exceed $d$ in order to yield the same income. The value of $d$ is:$\dfrac1{1+p}$$\dfrac1{1-p}$$\dfrac p{1+p}$$\dfrac p{p-1}$$\dfrac{1-p}{1+p}$