Предмет: Алгебра, автор: ilyadenisov02

Зарплату повысили на 10% , а потом понизили на 20%. На сколько % в результате понизилась зарплата? (Ответ: на 12%). Помогите срочно прошу завтра контрольная.

Ответы

Автор ответа: Flash3146

зарплата:20000
(20000+(20000*0,1))-(20000+(20000*0,1))*0,2=22000-4400=17600(р)-зарплата
20000-100%
17600-x
20000x=1760000:20000
x=88(%)-снизилась
100-88=12(%)

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