The cost of 100 gm. packet of biscuit is 15 rupee and that of 500 gm. packet is 55 rupee. If we compare cost of equal amount then % loss in purchasing a biscuit packet of 100 gm. in comparison to 500 gm. will be
The cost of 100 gm. in 100 gm. packet of biscuit is 15 rupee and
The cost of 100 gm. in 500 gm. packet of biscuit is 55/5 = 11 rupee
so comparative loss = 4 rupee
so % loss in comparison to 500 gm packet = [4/11]*100 = 400/11 = 36.36