Percent Change Math Example 1

Follow the full solution, then compare it with the other examples linked below.

Example 1

easy
A jacket originally costs \60andisonsalefor and is on sale for \4545. What is the percent decrease?

Solution

  1. 1
    Find the change: 60βˆ’45=1560 - 45 = 15.
  2. 2
    Divide by the original value: 1560=0.25\frac{15}{60} = 0.25.
  3. 3
    Convert to a percentage: 0.25Γ—100=25%0.25 \times 100 = 25\%.

Answer

25%Β decrease25\% \text{ decrease}
Percent change is calculated as changeoriginalΓ—100%\frac{\text{change}}{\text{original}} \times 100\%. A decrease means the new value is less than the original.

About Percent Change

Percent change measures how much a quantity has increased or decreased relative to its original value, calculated as newβˆ’originaloriginalΓ—100%\frac{\text{new} - \text{original}}{\text{original}} \times 100\%.

Learn more about Percent Change β†’

More Percent Change Examples

Example 2 medium

A town's population grew from [formula] to [formula]. What is the percent increase?

Example 3 hard

A stock price rises by [formula] one year and falls by [formula] the next year. If it started at [fo

Example 4 easy

A shirt's price increases from [formula]25[formula][formula]. What is the percent increase?

Example 5 medium

After a [formula] discount, a laptop costs [formula]680$. What was the original price?

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