Question

Find the marked price,ifSP is rs1800after allowing a discount of20%?

Answer 1

Let the marked Price be a

Selling price = Marked Price - Discount

=> 1800 = a - 20% of a

=> 1800 = a - 20a/100

=> 1800 = a - a/5

=> 1800 = 4a/5

=> a = 1800 × 5 / 4

=> a = 450 × 5

=> a = 2250

Marked Price = Rs 2250

Answer 2

hye

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we have to find the cost price

selling price = 1800 

discount = 20%

discount is like loss %

cost price = $\frac{selling price *100}{100 - loss}$

                  =$\frac{1800*100}{80}$

                   =180000/80

                   = rs. 2250

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hope it helps