An article is sold at a certain price. If it is sold at \(33\frac{1}{3}\%\) of this price, there is a loss of \(33{1\over3}\%\). What is the percentage profit or percentage loss when it is sold at 40% of the original selling price?
A and B working alone can complete a work in 8 days and 12 days, respectively. They started working together, but A left 2 days before completion of the work. In how many days was the work completed?
A certain number of persons can complete a work in 54 days. If there were 15 persons less, it would take 18 days more for the work to be completed. Initially, the number persons is: