A percentile rank explains how well a test-taker did in comparison to other test-takers, while a percentage rank explains how well a test-taker did on the test itself. For example, a student might answer 90 percent of questions correctly and rank in the 99th percentile. This means the student scored better than 99 percent of students who took the test.
Know MorePercentile ranks are used for tests where it is important to compare one test-taker's results to a large sampling of data. For example, doctors have special growth charts to rank children's height and weight by percentile. Children who fall into very high or very low percentiles are evaluated for health issues. Percentages are used in tests where individual performance is more important than relative performance. A doctor treating a child who has 40 percent lung function does not need to know the child's percentile.
Standardized tests often use percentiles to determine the best students. A very small number of students get perfect scores, or 100 percent accuracy, on the SAT. However, it is easier to determine percentile rank by looking at the total number of students who took the test, then divide that number by 100. Each year, the College Board releases data tables to show how percentile information corresponds to SAT test scores. A score of 770 or above in a single section generally ranks in the 99th percentile.
Learn more about Fractions & PercentagesTo figure out a percentage, a person simply divides the two numbers in question then multiplies the answer by 100. In most cases, a small number is divided by a large number. Depending on the circumstance, however, the process may be reversed.
Full Answer >To calculate percentage, divide the number that is to be expressed as a percentage by the total or whole. The resulting number is then multiplied by 100 to obtain the percentage.
Full Answer >A percentage is subtracted from a number by calculating the percentage in relation to that number and then performing a basic subtraction function. For example, to calculate 200 minus 70 percent, a person must first know that 70 percent of 200 is 140. Then, 140 is subtracted from 200 to get the answer, which is 60.
Full Answer >Percent simply means "per 100," so any percentage number can be expressed as number/100. For example, 75 percent can be expressed as the fraction 75/100 or as the decimal fraction 0.75.
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