a rate in which the second quantity in the comparison is one unit

an equation that states that two ratios are equivalent

a ratio that compares two quantities measured in different units

a comparison of two quantities by division

ratios provide the relationship between a particular group and the whole populations (including the particular group)

the ratio between corresponding measurements of an object and a representation of that object

a ratio or a fraction that represents a relationship between a part and its whole.

times 2

divide by 2