Ajay buys 18 oranges for ₹90 and sells 15 oranges for ₹105. Find the percentage of his gain.

35% 30% 25% 40%

40%

CP of 18 oranges = 90 CP of 1 orange = 5 SP of 15 oranges = 105 SP of 1 orange = 7 Profit = 7 - 5 = 2 Profit% =  \(\frac{2 × 100}{5}\) = 40%