You need to know a few terms first. A small discount means selling at a rate of 0.00 on the basis of the selling price.

Profit is how much money is earned on the basis of cost. 20% profit and 80% profit rate are based on this profit, which means you can get the cost price equivalent to 0.2 times and 0.8 times after removing the cost.

Understand the above terms, the problem is not difficult to solve.

First, the actual selling price of clothes is 200*0.6= 120 yuan, and then the profit is 20%, that is, 120-A = 0.2A, where a stands for cost price, and the whole formula is: 200 * 0.6-A = 0.2A, and a =/kloc-0.

Question 2: Similarly, 1375 * 0.8-a = 0.8a, and a = 611yuan.