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www.reference.com/world-view/calculate-year-over-year-percent-change-10bb79f0f5d86198

An individual calculates year-over-year percentage change, or YOY change, by evaluating two or more measurements and comparing them to the same period of time in a previous year.

www.reference.com/world-view/can-calculate-weighted-percentages-2b96671db80151e1

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.

www.reference.com/article/percentage-figures-calculated-559414a09fae9127

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.

www.reference.com/article/regular-calculators-give-percentages-f3d33e35cc1230a1

With a regular calculator using basic math functions, it is possible to calculate percentages. To calculate percentages on a regular calculator, find the difference between the two numbers be compared, then divide that number by the original number and multiply by 100. ...

www.reference.com/world-view/easiest-way-calculate-percentages-93b00f9a8b7229a5

The easiest way to calculate a percentage is taking 10 percent of any number and multiplying it to find the percentage desired. To calculate 10 percent of a number, simply move the decimal point one place to the left.

www.reference.com/article/calculate-percentages-whole-numbers-3be7ee12bccbbd3f

To determine the numeric value of a percentage of a whole number, convert the percentage into a decimal by moving the decimal point two places to the left, and multiply that by the whole number. For example, to find 50 percent of 20, multiply .50 by 20 to get 10.

www.reference.com/business-finance/calculate-percentage-dollar-d5c634d492a55001

To calculate a percentage of $1.00, treat it as 100 pennies. The percentage sought is equal to the same number in cents. According to Math Is Fun, "percent" is a number per 100, so treating $1.00 as a 100 pennies makes the math simple.

www.reference.com/world-view/calculate-winning-percentages-50cb2efbec798c16

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.

www.reference.com/article/calculate-population-growth-5b8ecfc4cf8308e9

Subtracting a past population value from the present population value, and dividing this result by the past population value, yields the population-growth rate. Multiplying the population-growth rate by 100 yields the growth percentage.

www.reference.com/business-finance/calculate-food-cost-percentage-82ccd004212450b2

StarChefs explains that food cost percentage is figured by taking the total beginning inventory cost plus purchases minus the ending inventory costs; then dividing that number by food sales.