Question

after giving a discount of 20% on Mark price,a book was sold for rs . 320 determine mark Price of the book​

Answer 1

20% of MP + MP= SP

Let MP taken to be as ₹x

20/100x + x = 320
[20+100/100]x = 320 (LCM)
(120/100)x = 320
x = (320*100)/120
x= ₹266.7


MP= ₹266.7

Answer 2

Discount = 20%

SP = Rs320

$marked \: price \: = \frac{100}{100 - d} \times sp \\ marked \: price \frac{100}{100 - 20} \times 320 \\ mp = \frac{100}{80} \times 320 \\ mp = 400$

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