Akshay, Vishal and Dipak purchased 2, 20 and 50 notebooks for a total of Rs 16, Rs 140 and Rs 400 respectively from a stationery shop. In his transaction with Akshay and Dipak, the shopkeeper made a profit of p% and q% respectively such that p = 3q.How much approximate profit/loss% did the shopkeeper make in his transaction with Vishal? (Assume that the shopkeeper bought each note book at the same price)