Предмет: Математика, автор: Аноним

Как найти, сколько процентов одно число составляет от другого? Для выращивания рассады кабачков посадили 15 семян. Проросло 12 семян. Определите , какая часть семян проросла , и выразите её в процентах.

Ответы

Автор ответа: ampoletta
0

15 - 100%

1215=0.8=80%

Автор ответа: Olivka777
0

То число, от которого рассчитываем процент - 100%. Таким образом:

15 семян - 100%

12 семян - х %

х = 12 * 100% / 15 = 1200/15 = 80%

 

Проросло 80% семян или 4/5.

Автор ответа: mefody66
0

Ответ:

Проросло 4/5 семян, или 80%.

Пошаговое объяснение:

Чтобы найти, сколько процентов составляет одно число от другого, нужно первое разделить на второе и умножить на 100.

В нашем примере проросло 12 семян из 15, это

12/15*100% = (3*4)/(3*5)*100% = 4/5*100% = 0,8*100% = 80%

Вот и всё, очень просто.

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