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ratio
/ˈreɪʃiˌoʊ/
noun
plural
ratios
plural
ratios
Learner's definition of RATIO
[count]
:
the relationship that exists between the size, number, or amount of two things and that is often represented by two numbers

The college has a 12:1 ratio between students and teachers. = The college's studenttoteacher ratio is 12 to 1. [=for every 12 students, there is one teacher]

What is the lengthtowidth ratio?
—
often + of

The ratio of students to teachers is 12 to 1.

Women outnumbered men by a ratio of three to two. [=for every three women, there were two men]

The office has a high ratio of males to females. [=there are many more males that work at the office than females]
—
see also aspect ratio