If the selling price of 16 water bottles is equal to the cost price of 17 water bottles, find the gain per cent earned by the dealer.
Let CP of 17 bottles = Rs.100.
CP of 17 bottles = SP of 16 bottles = Rs.100
SP of 17 bottles =
= Rs.106.25
Gain = SP – CP
= 106.25 – 100
= 6.25
= 6.25%