The ratio of marketed price to selling price of an article is 12 : 7. What is the discount percentage?
Marked price (MP), Selling price (SP)
Assume that MP = 1200
          SP = 700
Discount% = $$ \frac{MP - SP}{MP} \times 100 $$
        = $$ \frac{500}{1200} \times 100 $$
        = 41.67%
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