Answer:

Given that,

C.P.=Rs. 12000 and S.P.=Rs. 12800

Since S.P.>C.P., it is a gain.

We know that, gain=S.P.−C.P.

∴ gain=Rs. 12800−Rs. 12000=Rs. 800

∴ gain=Rs.800

We also know that, gain%=

C.P.

gain×100

∴ gain%=

12000

800×100

=

12

80

%

∴ gain%=6

3

2

%

Hence, the gain percent for the given information is 6

3

2

%