Q:

# How can you calculate weighted percentages?

A:

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.

As 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 .

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Calculating percentages is a key concept in mathematics. Percentage calculations are important in all forms of mathematics including algebra, geometry and calculus. They're also utilized in many sciences such as chemistry, physics and biology.

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Winning percentage can be calculated by dividing the number of wins by the total number of games played. The percentage can be displayed as a decimal less than or equal to 1, or as a percentage between 0 and 100 percent.