Question

Find the SP of a table for which the cp is RS 650 and the gain 6 %

Answer 1

we know,
%gail=(sp-cp)/cp
6%=(sp-650)/650
6/100=(sp-cp)/650
(6*65)/10+650=sp

Answer 2

We know that  

  S. P = (100 + gain) / 100 x c.p

        = (100 + 6) / 100 x 650

     = 106 / 100 x 650

     = Rs 1959