A man purchases 8 pens for Rs.9 and sells 9 pens for Rs.8, how much profit or loss does he make?
Q1. A man purchases 8 pens for Rs.9 and sells 9 pens for Rs.8, how much profit or loss does he make?
Answer: 20.98% loss
Explanation: CP of 9 pens = 9×(9/8) = Rs. 81/8; SP = Rs. 8; loss = (81/8−8)/(81/8)×100 = (17/8)/(81/8)×100 ≈ 20.98% loss.