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Q:A:### Quick Answer

**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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- Q:
## How do I calculate the percentage of a sum?

A:To find the percentage of a number, multiply the number by the percentage fraction. A percentage is a proportion between two quantities expressed in hundredths.

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## How do you calculate percentage difference?

A:Calculate 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.

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## How do I calculate the percentage of something?

A:

Full Answer >**To calculate the percentage represented by a ratio, divide the numerator by the denominator, and multiply by 100.**For example, given the ratio 14 out of 50, the corresponding percentage is found by dividing 14 by 50, which is 0.28, then multiplying 0.28 by 100 to get 28 percent.Filed Under: - Q:
## How do you calculate a percentage increase?

A: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.

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