Lets wholesaler list prices is Rs100
Then wholesaler gives 20% discount to retailer.
Then selling price to retailer =100−20=Rs80
Retailer sell 5% to customer discount on list price =Rs5
Then, retailer selling price =100−5=Rs95
As per question, customer paid Rs114 to retailer
Then list price =100×11495=120
Then C.P of retailer =80×120100=96
Profit gain by retailer =114−96=Rs18
% of profit =18×10096=18.75%