A man bought 400 meters of cloth for rs. 40,000 and sold it at a rate of rs. 200 per one and a half meter. What was his percentage profit or loss?

Cost per meter = 40000/400

= 100

Sale price for meter = 200/1.5

= 133.33

So, profit margin = (Sales price – cost price)/ Sales price x 100

= (133.33 – 100) /133.33 x 100

= 25%

Hence the profit margin is 25% on selling price.