Question

По­сту­пив­ший в про­да­жу в ян­ва­ре мо­биль­ный те­ле­фон стоил 3000 руб­лей. В марте он стал сто­ить 2790 руб­лей. На сколь­ко про­цен­тов сни­зи­лась цена на мо­биль­ный те­ле­фон в пе­ри­од с ян­ва­ря по март?

Answer 1

Решение:
Решим пропорцией:
100/х=3000/2790
х=2790*100/3000
х=93%-новая цена
100-93=7%
Ответ:цена изменилась на 7%

Answer 2

Calculation of Percentage Decrease in Price

To calculate the percentage decrease in price of the mobile phone from January to March, we can use the following formula:

Percentage decrease = ((Initial price - Final price) / Initial price) * 100

Given that the initial price of the mobile phone in January was 3000 rubles and the final price in March was 2790 rubles, we can substitute these values into the formula:

Percentage decrease = ((3000 - 2790) / 3000) * 100

Calculating this expression, we find that the percentage decrease in price of the mobile phone from January to March is approximately 7.0%.

Please note that the search results did not provide specific information about the price of the mobile phone in January and March. Therefore, the calculation is based on the assumption that the initial price was 3000 rubles and the final price was 2790 rubles.