Предмет: Математика, автор: MelinaHadson

1)Скорости двух пешеходов относятся как 5:4. На сколько процентов скорость первого пешехода больше скорости второго?На сколько процентов скорость второго пешехода меньше скорости первого?
2)Скорости двух лыжников относятся как 9:10. На сколько процентов скорость первого лыжника меньше скорости второго ? На сколько процентов скорость второго лыжника больше скорости первого?

Ответы

Автор ответа: биофизик

1) допустим
5 ––100%
4 ——х
Отсюда х=4*100/5=80%
100–80=20%
Разница между ними 20%

2) 10 ––100%
9––х
Отсюда х =9*100/10=90%
100–90=10% разница между ними 10%

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