Question

В магазине цены сначала были повышены на 10% а потом снижены на 10% как изменилась цена?Обоснуйте ответ

Answer 1

Возьмем цену: 100
10% от 100 = 10
100+10=110 - после повышения
10% от 110 - 11
110-11 = 99 - после понижения.

Почему так получилось? Потому что мы берем нефиксированную цену, а ту, которая изменяется.
Ясненько?)

Answer 2

Calculation of Price Change

To determine how the price changed after being first increased by 10% and then decreased by 10%, we can use a simple calculation.

Let's assume the original price of the item is $100.

First, the price is increased by 10%, which means it becomes $100 + 10% of $100 = $100 + $10 = $110.

Next, the price is decreased by 10%, which means it becomes $110 - 10% of $110 = $110 - $11 = $99.

Therefore, the final price after the initial increase and subsequent decrease is $99.

Explanation

When the price is increased by 10%, it is multiplied by 1.1 (100% + 10% = 110%). This represents an increase of 10% over the original price.

When the price is decreased by 10%, it is multiplied by 0.9 (100% - 10% = 90%). This represents a decrease of 10% from the increased price.

In this case, the decrease of 10% is calculated based on the increased price of $110, resulting in a final price of $99.

Please note that the calculation assumes a simple percentage increase and decrease. In real-world scenarios, there may be additional factors or calculations involved.