Question

If selling an article for $₹820$ causes $10\%$ loss on the selling price, then find its cost price.

Answer 1

Given that selling price $(5.P)=₹820$
Loss $\%=10\%$
As per formula $5.D=C.P\times \frac{(100-1055\%)}{100}$
$\therefore$ Substituting in formula, we get
$\begin{array}{cc}& 820=C.P\times \left(\frac{100-10}{100}\right)\\ & \therefore C.P=\frac{820\times 100}{90}\\ & =911\end{array}$