Given: The cost price of 100 mangoes is equal to the selling price of 80 mangoes Calculation Let selling price =cost price According to question, 100×CP=80×SP CP÷SP=80∕100 CP÷SP=4∕5 Profit percentage =(5−4)÷4×100 Profit percentage =1÷4×100 Profit percentage =25% Hence, profit percentage =25%