In this section, ratios and proportions are defined.

• *Ratios* depict the relation between two similar values with respect to the number of times the first contains the second. A ratio represents a comparison between two quantities. For example, if the ratio between apples and oranges in a fruit bowl is 3 to 2, then for every 3 applies there are 2 oranges.

• Ratios are written 3 to 2, 3:2, and 3/2.

• The difference between ratios and fractions is that fractions represent part-per-whole, and ratios represent part-per-part.

• *Proportions* are a comparative relation between the size, quantity, etc., of objects ...

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