# A shopkeeper purchased 70 kg of potatoes for Rs.420 And sold the whole lot at the rate of Rs. 6.50 per kg. What Will be his gain percent ?

$\par&space;C.P.&space;of&space;1&space;kg&space;=$ $\par&space;Rs.$$(\frac{420}{70})$  $=$ $\par&space;Rs.&space;6$

$\par&space;S.P.&space;of&space;1&space;kg&space;=$ $\par&space;Rs.&space;6.50$

$\par&space;Gain\%&space;=$  $(\frac{0.50}{6}\times&space;100)\%&space;=&space;\frac{25}{3}\%&space;=&space;8\frac{1}{3}\%$