Вопрос школьника по предмету Математика
джинсы стоили 650 р. Цену на них увеличили на 25% на сколько процентов нужно уменьшить новую цену,чтобы вернуть ее к первоначальной ?
Помогите срочно умоляю
Ответ учителя по предмету Математика
650× 0.25=162.5
650+162.5=812.5
812.5-(812.5×X)=650
812.5-812.5X=650
812.5X=162.5
X=0,2= 20%
Ответ: на 20%
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