Ratio and Proportion

Question 1

What is proportion?

Answer 1

A proportion is a name we give to a statement that two ratios are equal. It can be written in two ways:

two equal fractions, a/b = c/d

or

using a colon, a:b = c:d

Ratio compares part to part

Proportion compares part to whole

Question 2

When are two ratios equal?

Answer 2

when the cross products of the ratios are equal.

That is, for the proportion, a:b = c:d , a x d = b x c

Question 3

How to find an equivalent ratio?

Answer 3

To find an equivalent ratio we can divide both parts of a ratio by same number, or we can multiply both parts of same ratio by same number.

Question 4

When is a ratio is in its simplest form?

Answer 4

When both numbers in the ratio have no common factors other than 1