«In mathematics, a ratio is a relationship between two numbers of the same kind (e.g., objects, persons, students, spoonfuls, units of whatever identical dimension), usually expressed as "a to b” or a:b, sometimes expressed arithmetically as a dimensionless quotient of the two which explicitly indicates how many times the first number contains the second (not necessarily an integer). In layman’s terms a ratio represents, simply, for every amount of one thing, how much there is of another thing. For example, suppose I have 10 pairs of socks for every pair of shoes then the ratio of shoes:socks would be 1:10 and the ratio of socks:shoes would be 10:1.»

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