How would you determined that a ratio is proportion?

Answer 1

A ratio cannot become a proportion but can be solved in one.

So you want to know how to tell if two ratios/fractions are equal?

First, cross multiply the fractions, then check to see if the equation is true:

3/4 = 27/36

because

3 * 36 = 4 * 27

Work it out on your calculator. Also:

1/3 =/= 1/2 (does not equal)

because

1 * 2 =/= 1 * 3

Another example:

1 / 2 = 2 / 4

because

1 * 4 = 2 * 2

Get it?