 This comparison of a specific quantity to "the whole" is called a proportion.If the ratio consists of only two values, it can be represented as a fraction, in particular as a decimal fraction.For example, older televisions have a 4∶3 "aspect ratio", which means that the width is 4/3 of the height (this can also be expressed as 1.33∶1 or just 1.33 rounded to two decimal places).