Question

Цена товара снижалась два раза на одно и тоже число процентов и снизилась в результате с 500 рублей до 320 рублей на сколько процентов каждый раз снижалась цена товара?

Answer 1

Пусть число % это Х, тогда составим уравнение: 500 - х*500- х(500-500х)=320 500х^2-1000х+180=0 25х^2-50х+9=0, решаем через дискриминант, получаем х1=0,2 (то есть 20%), х2=1,8 (то есть 180%)-это невозможно Ответ 20% Проверка: было 500-20%=400₽, ещё раз скидка 20%=400-80=320

Answer 2

Calculation of the Percentage Decrease in Price

To calculate the percentage decrease in price, we need to determine the percentage by which the price decreased each time. We know that the price decreased from 500 rubles to 320 rubles. Let's calculate the percentage decrease for each step.

Let's assume that the price decreased by the same percentage each time. Let's call this percentage "x".

The first decrease can be calculated as follows: - Initial price: 500 rubles - Decreased price: 320 rubles - Percentage decrease: (500 - 320) / 500 * 100 = 180 / 500 * 100 = 36%

So, the first decrease was 36%.

Now, let's calculate the second decrease: - Initial price: 320 rubles - Decreased price: Let's assume it is "y" rubles. - Percentage decrease: (320 - y) / 320 * 100 = x%

Since the percentage decrease is the same for both steps, we can equate the two equations:

36% = x%

Solving for "x", we find that "x" is equal to 36%.

Therefore, the price of the item decreased by 36% each time.

Please note that the search results provided by You.com did not contain specific information related to this question. The calculation above is based on the assumption that the percentage decrease was the same for each step.