The first question to ask yourself when finding the percent of change is: Is it an increase or a decrease?
Let's try a problem:
175 to 200 -- We have an increase of 25 and subtracted to find out the amount of change.
Next, we will divide the amount of change by our original amount.
25 ÷ 200 = 0.125
Now we need to change the decimal to a percent by multiplying 1.125 by 100:
We now know that the percentage of change which in this case is an increase from 175 to 200 is 12.5%
Let's try one that is a decrease:
Let's say I weigh 150 pounds and I lost 25 pounds and want to know my percentage of weight loss.
I know the change is 25.
I then divide the amount of change by the original amount:
25 ÷ 150 = 0.166
Now I will multiply 0.166 by 100 to obtain my percentage of change:
0.166 x 100 = 16.6%
Therefore, I have lost 16.6% of my body weight.
Understanding the percentage of change concept is important for crowd attendance, points, scores, money, weight, depreciation and appreciation concepts etc.