Explain Percentage Change Calculator

Introduction:
                  A percentage change is a way to express a change in a variable. It represents the relative change between the old value and the new one.
The formula used to calculate the percentage change is

Percentage change formula= `((V2 - V1) / (V1)) * 100` .

V_1- represents the old value

V_{2 -} the new one.                                                        

Example 1:
Chris bought 40 Compact disks last month.  He bought only 30 this year.  Calculate is the percent of change.
Solution:
Here,          V2 = new value =  35 Compact disks
                     V1 = old value = 40 Compact disks
Percentage of change =?
By plugging in the given values in to the formula we get
Percentage change =  `(35 -40) / (40)` * 100.
The difference between 35 and 40 is 5
By plugging in the given values in to the formula we get,
 = `5 / 40` * 100
The fraction 8/ 40 gives us  1/5.
`= 1/ 5 ` * 100.
= 20%
The percentage of change is 20 %

Hope you liked the above explanation of  Percentage Change Calculator. Please leave your comments, if you have any doubts.