Question

Сначала цена товара понизилась на 15%, а потом его новая цена повысилась на 15%. Стал товар дешевле или дороже его первоначальной цены? Я поняла что товар подешевел, но не пойму как это записывать с решением....

Answer 1

 Исходная цена 100, уменьшили на 15%, значит такая пропорция:

85 - 100%

х - 115%

 

х=97,75 следовательно товар стал дешевле  на 2.25%

 

 

 

 

 

 

Answer 2

Calculation of Price Change

To determine whether the price of the product has become cheaper or more expensive after a 15% decrease followed by a 15% increase, we can calculate the final price using the following steps:

1. Start with the original price of the product. 2. Decrease the price by 15%. 3. Increase the resulting price by 15%.

Let's go through the calculation step by step.

Calculation Steps

1. Let's assume the original price of the product is $100. 2. Decreasing the price by 15%: - 15% of $100 is $15. - Subtracting $15 from $100 gives us $85. 3. Increasing the resulting price by 15%: - 15% of $85 is $12.75. - Adding $12.75 to $85 gives us $97.75.

Conclusion

After a 15% decrease followed by a 15% increase, the final price of the product is $97.75. Therefore, the product has become cheaper compared to its initial price of $100.

Please note that the calculation assumes a linear decrease and increase in price. In real-world scenarios, prices may be subject to various factors and fluctuations.