Ratio: Ratio of a one number to another number is a quotient of first number.
Like x and y are two numbers then ratio is x : y or x / y.
For example: If in a glass there is 25% is water and 75% is milk then the ratio of water and milk is
25/75 = 5/15=1/3 in short form.
Take another example:
Gold and Platinum- Gold is 30 % and 60 % is Platinum then the ratio of gold to platinum is 30 / 60=1 / 2.