An article is listed at Rs. 8,500 and the discount offered is 12%. What additional discount (percent) must be given to bring the selling price to Rs. 6,358?

Solution (By Examveda Team)

$$\eqalign{ & {\text{Let the discount}} = x\% \cr & a = \left( {100 - x} \right) \cr & 8500 \times \frac{{88}}{{100}} \times \frac{a}{{100}} = 6358 \cr & a = 85 \cr & 85 = 100 - x \cr & x = 15\% \cr} $$