Предмет: Алгебра, автор: AdmiralBullDog2005

В начале учебного года в школе было 1350 учащихся, а к концу года их стало 1215. На сколько процентов уменьшилось за учебный год число учащихся?

Ответы

Автор ответа: denisdemins

на 10%
1350-1215=135
1350:135=10

Автор ответа: БунтаркаFM

1350 -- 100%
1215 -- х%
Найти - разницу между учащимися в начале года и в конце года.
Составим пропорцию:
1350 100 ___ = ____

1215 х

х= (1215*100)/1350
x= 90 %

100%-90%=10%
Ответ:на 10%

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