If a commodity is sold at a fixed price, it will make a profit of 20 yuan. If it is sold at a 15% discount, it will lose 4 yuan?

(20+4)/0.15-20=140

If a commodity is ready to be sold at a discount in the new season, if it is sold at a 25% discount on the original price, it will lose 25 yuan, while if it is sold at a 10% discount on the original price, it will earn 20 yuan
A. 500 yuan B. 400 yuan C. 300 yuan D. 200 yuan

Suppose the original price of this commodity is x yuan. According to the meaning of the question, we get: 75% x + 25 = 90% x-20, and the solution is x = 300

If a commodity is sold at a price of 70% off, it will lose 40 yuan. If it is sold at a price of 10% off, it will make a profit of 20 yuan. How much is the price of the commodity?
Be clear about the process, thank you

（40+20）÷（0.9-0.7）
=60÷0.2
=300 yuan

The price of a commodity is 80 yuan, which is 20 yuan lower than that in the past______ %．

20 (80 + 20), = 20 (100), = 20%; a: reduced by 20%

There is a kind of school supplies in the shopping mall. The price is 171 yuan, which is 10% cheaper than the original price. How much cheaper is it
There are 1491 qualified and 9 unqualified ones. The unqualified rate is calculated

Cheap amount = 171 / (1-10%) * 10% = 19
9/（1491+9）*100%＝0.60%
Hope to help you!

A mall gives a discount on woolen sweaters. If the price is 120 yuan and the discount is 20%, the selling price of the sweaters is 120 yuan per piece___ Element. Solving equation

The original price is set at x yuan
X*0.8=120
X=120/0.8
X=150
The original price is 150 yuan

The current price of a sweater is 200 yuan, which is 20% cheaper than the original price. How much cheaper is it

200*（1+20%）
=200*1.2
=240

There are two kinds of woolen sweaters with the same price in a shopping mall. Because they are sold at a discount in the new season, a kind of woolen sweaters are sold at a 40% discount, and B kind of woolen sweaters are sold at a 50% discount. Aunt Zhang bought these two kinds of woolen sweaters for a total of 108 yuan. How much is the original price of these two kinds of woolen sweaters?

Actually put the application questions on it directly?!
Assuming that the original price is x, then 0.4x + 0.5x = 108, that is, 0.9x = 108, x = 120
I don't know what grade the building owner is? Isn't it faster to consult the people around him?

The market sells a kind of woolen sweater. The current price is 120 yuan, which is 25% cheaper than the original price. How much is the current price cheaper than the original price?

Cheap = 120 (1-25%) - 120 = 40 yuan

A shopping mall is engaged in promotion activities, so all products are discounted by 75%. The current price of a sweater is 60 yuan. How much cheaper is it than the original price?

60 / 0.75-60 = 80-60 = 20 yuan

If a commodity is sold at a fixed price, it will make a profit of 20 yuan. If it is sold at a 15% discount, it will lose 4 yuan?