12 деревьев = 100%
4 дерева = ?
Пропорция :
12 - 100%
4 - x%
x = 4 * 100 / 12 = 33,3%, т. е. 1/3 часть
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12 деревьев = 100%
4 дерева = ?
Пропорция :
12 - 100%
4 - x%
x = 4 * 100 / 12 = 33,3%, т. е. 1/3 часть