Предмет: Математика, автор: snezankamoroz

Ресторан швидкого харчування в рекламних цілях спочатку знизив ціну комплексного обіду на 20%, але згодом нову ціну підвищив на 40%. На скільки відсотків кінцева ціна обіду є більшою від початкової?

Ответы

Автор ответа: Пеппер

Ответ:

12%

Пошаговое объяснение:

Нехай початкова ціна х, тоді зменшена ціна х-0,2х=0,8х.

0,8х + 0,4(0,8х) = 1,12х

Кінцева ціна на 12% вища від початкової.

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