# Comparison Using Percents

by Tenneh Sesay
(Boston )

how do u find comparison using percent

Calculating a percent is extra work.

However, once the percent calculation has been completed, PERCENTS are EASY TO UNDERSTAND.

### Comments for Comparison Using Percents

 Feb 14, 2011 Comparison Using Percents by: Staff ----------------------------------------------------------------------------------------------- Part II 3. Fractions could be used instead of a percent. A percent is used represent a proportion. However, the most STRAIGHTFORWARD way to represent a PROPORTION is to USE a FRACTION. For example, suppose the first student in the example actually took a test with only 75 questions and answered 63 questions correctly. The proportion of questions answered correctly can be represented by the fraction 63/75 (63 correct answers out of 75 questions). Now suppose the second student in the example actually took a test with 150 questions and answered 129 questions correctly. The proportion of questions answered correctly can be represented by the fraction 129/150 (129 correct answers out of 150 questions). Which student is the best student? Compare the fractions. Which student has the highest average (which is the larger fraction)? 63/75 or 129/150? It is very hard to answer that question by merely glancing at these fractions. Writing fractions to represent a proportion may be easy, but comparing different fractions can be frustrating and time consuming. Using a percent to compare two proportions does not have this difficulty. Comparing two percents is easy to do. That is why a percent is normally used instead of a fraction. (However, remember that a fraction and a percent both REPRESENT exactly the same thing: a PROPORTION.) 4. How to calculate a percent. Calculating a percent requires a small amount of work. Calculating a percent means the fraction (which represents the proportion) must be converted to a decimal, and then the decimal must be multiplied by 100. To complete this process: use a calculator or be prepared to do some division long hand. Converting the two fractions from (3) to percents? 63/75 and 129/150 Percent – 1st student Proportion = 63/75 = (63/75) * 100 = (.84) * 100 = 84 % Percent – 2nd student Proportion = 129/150 = (129/150) * 100 = (.86) * 100 = 86 % Thanks for writing. Staff www.solving-math-problems.com