are two or more ratios that compare the same quantities.
You can compare different quantities, or numbers, using .
A is a comparison between two quantities with different units of measure.
A is a rate that compares a quantity to one unit.
A is a number, or it is any combination of sums, differences, products, or divisions of numbers that evaluates to a number.
The of a numerical expression is the number found by evaluating the expression.
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