An article was sold for ₹512 after giving two equal successive discounts on the marked price of ₹800. The percentage discount offered is:

20%

Given=

M.P = 800

S.P = 512

Now, M.P : S.P = 800 : 512 = 400 : 256

Here, two discounts are given successively. So, after one discount the ratio becomes,

M.P : S.P = √400 : √256

M.P : S.P = 20 : 16

Discount% = (20-16) × \(\frac{100}{20}\) = 20%