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You have your original amount and a new amount. Take whichever is the larger and subtract from the smaller to find the amount by which the original has changed. Now divide this difference by the original amount and multiply by 100 to find the percentage change.
An example.
I have 50 marbles. I am given another 5 marbles (making 55 in total). So...
55 - 50 = 5
5/50 = 0.1
0.1 * 100 = 10
So I now have 10% more marbles than I did before.
Of course if I had, let's pretend, not been given 5 more marbles but had in fact lost 5 marbles, then it would still be a 10% change (in the first part of the calculation above we would do 50 - 45 and still end up with 5), but I would have 10% less than before.
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How do you figure what percent of the total area one small area is?
There are many methods to do this. One is to calculate the are of the enitire figure. Then figure out the area of the smaller area. Then divide the smaller figure's area by the larger figure's area and change the answer to a percent. For example, if you were asked to figure out what percent of square A with sides measuring 5 cm was covered by square B (which is completely inside of square A) with sides of 1 cm. 1. Calculate the are of square A. 25 cm2 2. Calculate the are of square B. 1 cm2 3. Divide square B by square A. 1/25 or 0.04 4. Convert to a percent. 4%
How do you calculate 15 percent increase on a figure?
Multiply the figure by 1.15
Percent of change if 56 is decreased to 14?
The percent of change is -75%
How do you work out a figure as a percentage of another figure?
Divide the figure (usually the smaller one) into the base figure (usually larger). Then to get the percent figure, multiply the fraction by a hundred. For example, in a class 34 students, 11 are male, what percent of the class is male? 11/34=0.32 then 0.32X100=32%.
When the percent change in price is equal to the percent change in quantity demanded demand is said to be what?
in equilibrium
