Finding Percentage Change on a Base Value Percentage change tells us how much a value has changed relative to its original value. To find the percentage chan...
Percentage change tells us how much a value has changed relative to its original value. To find the percentage change, we subtract the original value from the new value and then divide the result by the original value. The result will always be expressed as a percentage.
Formula:
Percentage change = (New value - Original value) ÷ Original value × 100
Example:
Let's say you buy a book for 12.
Original value = $10
New value = $12
Using the formula, we calculate:
Percentage change = (10) ÷ $10 × 100 = 20%
Therefore, the book's price has increased by 20%.
Additional Notes:
A percentage change of 0% means the value remained the same.
A percentage change greater than 100% indicates an increase, while a percentage change below 100% indicates a decrease.
You can also use this formula to find the percentage change of a decrease by subtracting the original value from the new value