If the C.P. of 11 shirts is equal to the S.P. of 10 shirts, find the % profit or loss.

Let the CP of
11 shirts = x

 Therefore CP of 1 shirt = x/11

SP of 10
shirts = x   ( Given that CP of 11 shirts is same as SP of 10 shirts)

Therefore SP of 1 shirt = x/10

Profit on 1 Shirt = SP €“
CP

                        =   x/10 - x/11

                              = ( 11x-10x )/110

                               = x/110

 Profit %  =  Profit / CP   X
100

                     = (  x/110  / x/11  ) x 100

                     =   ( 11/110 )x 100

                      =
10