Percent of Change
Key Questions

The percentage change formula is:
#(X_2 / X_1  1) * 100# where
#X_1# is the original value and#X_2# is the final value.Example:
If Google's stock price increases from $500 to $575, it has increased by 15%.
#(575 / 500  1) * 100 = 15%# 
Answer:
See the process below:
Explanation:
The formula for calculating the percent change in a value between two points in time is:
#p% = (N  O)/O * 100# Where:
#p# is the percent change#N# is the New Value.#O# is the Old ValueTake the old and new values you are given in the problem, substitute them for
#O# and#N# and calculate the percent change 
The formula for calculating the percent change in a value between two points in time is:
#p = (N  O)/O * 100# Where:
#p# is the percent change#N# is the New Value#O# is the Old Value 
If
#x# is some changing quantity, and#Delta x# be the change in#x# value, then the percentage change can be found by#{Delta x}/x times 100#
Example
What is the percentage change (discount) of $12 discount on $300 item?
#{12}/{300} times 100=4%# discount
I hope that this was helpful.
Questions
Linear Equations

OneStep Equations and Inverse Operations

Applications of OneStep Equations

TwoStep Equations and Properties of Equality

MultiStep Equations with Like Terms

Distributive Property for MultiStep Equations

Equations with Variables on Both Sides

Equations with Ratios and Proportions

Scale and Indirect Measurement Applications

Conversion of Decimals, Fractions, and Percent

Percent Equations

Percent of Change

Formulas for Problem Solving