A business man sold two flats for ₹8,25,000 each. On one he gains 9% while on the other he loses 9%. Then how much is his gain or loss in the whole transaction?

Correct option is D

Given:

Fastly Gain 9%, then loses 9%

Each flat value 825000

Formula Used:

x + Y + $$\frac{XY}{100}$$​​

Solution: 

9-9+$$\frac{9\times-9}{100}$$

=  $$\frac{-81}{100}$$ 

= 0.81

Option (d)