Oranges are bought at 5 for Rs. 10 and sold at 6 for Rs.15. His gain per cent is
Cost Price of 1 Orange =Rs.10/5 = Rs.2
Selling Price of 1 Orange =Rs.15/6 = Rs.2.5
Gain = SP – CP
= 2.5 - 2
= 0.5
Gain Percent = 
= (0.5 × 100) / 2
= 25%
10
Oranges are bought at 5 for Rs. 10 and sold at 6 for Rs.15. His gain per cent is
Cost Price of 1 Orange =Rs.10/5 = Rs.2
Selling Price of 1 Orange =Rs.15/6 = Rs.2.5
Gain = SP – CP
= 2.5 - 2
= 0.5
Gain Percent =
= (0.5 × 100) / 2
= 25%