A trader declares that he will sell his commodity at $10\%$ profit over his cost price. However, he alters his weighing balance to sell $10\%$ less to each customer. What is his true profit margin in percent?

By selling a cloth that is $33$m long, a draper loses an amount equal to the selling price of $3$m of cloth. What is his loss %?

A trader prints price-tags after having decided to sell his product at 25% profit over the cost price that his supplier has just informed. He later realises that a 10% GST would also be payable on the product sourced from the supplier. What is his profit now, in percent?

In normal times, a vegetable exporter assumes that 20% of the produce sent in a container will perish by the end of the voyage to international markets, and he prices the sent vegetables at Rs 2L per ton to enjoy a 20% profit. Due to difficult shipping conditions now, he estimates that 50% of his produce inside the container will become unsellable, despite transport costs per container also increasing from Rs 2L to Rs 4L. If a container can store 10 tons of vegetables, what would be the new price he would ask (per ton) to retain his profit?