Answer:

A comparison of two quantities which can be written in colon,word or fraction form.

a.extrems

b. means

c. ratio

d. extremes

Step-by-step explanation:

A ratio is a comparison of two quantities. Ratios can be expressed using words, with a colon, or in fractional form • A ratio can represent part-to-whole or part-to-part relationships. Fractions and percents are special types of part-to-whole ratios.

Answer:

C. ratio is a comparison of two quantities.