Предмет: Алгебра, автор: MelaniMiller

На сколько % изменилась цена, если она была 100 рублей, а стала 250 рублей? С РЕШЕНИЕМ

Ответы

Автор ответа: vibondrk
2

Нужно решить задачу на проценты. Для этого воспользуемся составлением пропорции. Обозначим за х процентную долю нового числа. Изначальное число обозначим за 100 %.

Составим следующую пропорцию:

100 = 100 %;

250 = х %;

Решим данную пропорцию с помощью метода диагоналей, перемножив каждую диагональ между собой.

100 * х = 250 * 100;

Упорядочим данное уравнение, выполнив возможные действия умножения:

100 * х = 25000;

Найдем х:

х = 250 %.

Значит, цена изменилась на 150 %.

Ответ: цена изменилась на 150 %.

Автор ответа: vladislavverbich
0

Ответ: на 150%

Объяснение:

100 рублей-100%

250 рублей-250% (логично,но если что ищется из пропорции).Новая цена 250 %-100%=150% изменение цены

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