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mathematics percentages formula. 36y 24100 y 24 36 100 y 24 3600 Divide 3600 by 24 to get y 360024 150 y 150 Therefore 24 of 150 is 36 How to use the other formula for percentage on the right. Were faced with a Reverse Percentage problem as soon as we are given the value of a number following either a percentage increase or a percentage decrease and were asked to find what the number was its initial value before the increase or decrease took place.
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Percent implies for every hundred. My Dictionary says Percentage is the result obtained by multiplying a quantity by a percent. As you probably remember from high school math class a percentage is a fraction of 100 that is calculated by dividing the numerator by the denominator and multiplying the result by 100.
Then divide that number by the first of the two amounts.
This process is the reverse of what you did earlier. The 5 apples is the percentage. P Y X 9 13 P 9 13 06923 Convert decimal to percent by multiplying by 100 06923 100 6923 9 13 6923 So 9 of 13 is 6923. Heres a typical reverse percentage question.
