To calculate a weighted percentage, first multiply each item by the percentage it has been allotted, and then add those values together. Weighted percentages help in situations where certain factors are more important than others.
Know MoreAs an example, a teacher might inform his or her students that the year's grade will be based on tests that will be worth 50 percent of the grade, quizzes that will count for 30 percent and homework assignments that will count for the remaining 20 percent of the grade. If a student had a 95 percent average on the tests, a 90 percent average on the quizzes and a 100 percent average on the homework assignments, the weighted percentage would be calculated as follows: "(95 x 0.5) + (90 x .3) + (100 x .2) = 47.5 + 27 + 20 = 94.5". The final grade for the student would be 94.5 percent .
Learn more about Fractions & PercentagesCalculate the percentage difference of two numbers by dividing the difference of the numbers by their average. Multiply this answer by 100 to determine the percentage difference.
Full Answer >Calculate a percentage increase by subtracting the old value from the new one, dividing the difference by the old value and then multiplying the quotient by 100. You need the new and old value.
Full Answer >Reverse percentage can be calculated by dividing a known amount by 1 minus the discount rate or 1 plus the tax rate. Such calculations are helpful in determining the original price of a sale item purchased or the pretax price of a transaction already done.
Full Answer >To calculate a percentage, simply divide one number into the other and multiply by 100. The order of division is important, and is determined by the wording of the question.
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