"The base, denoted by the letter b, is the entire quantity or total involved. Note: The number that is the base usually appears after the word of. The amount, denoted by the letter a, is the part being compared to the whole or total. Therefore, the percent proportion<span> can be written by a." https://www.google.com/search?q=Define+Percent+Proportion&oq=Define+Percent+Proportion&aqs=chrome..6... Hope this helps! </span>
