A fruit seller purchases oranges at the rate of 3 for Rs.5 and sells them at 2 for Rs.4. His profit in the transaction is _____

Cost Price of 3 Oranges= 5
Sale Price of 1 Orange=5/3
Cost Price of 2 Oranges=4
Sale Price of 1 Orange=4/2
Profit%=(SP-CP) / CP *100