Предмет: Русский язык, автор: евгений123456777

перед началом учебного года цена на тетради была снижена со 120 до 90 р на сколько процентов была снижена цена на тетради

Ответы

Автор ответа: prazision

120р - это было 100% стоимости. потом цена стала 90р.
90/120=3/4 или 0,75 или 75% от первоначальной стоимости. значит 100-75=25% разница между старой и новой ценой

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