Предмет: Математика, автор: ABCiliSUPER

Книга стоила 25 000 рублей. После повышения цены она стоит 30 250 рублей. На сколько процентов возросла стоимость книги??
Прошу,срочно((( 15 баллов

Ответы

Автор ответа: Елена200402
0
Я УБРАЛА НУЛИ И ВОТ ЧТО ПОЛУЧИЛОСЬсоставим пропорцию.
25/100=30,25/х
х= 100*30,25/25=121.
121-100=21%
Ответ: 21 % ТОЛЬКО С НУЛЯМИ РАЗБЕРИСЬ
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