Percentage Increase/Decrease

Calculating the percentage increase or decrease is a valuable skill for tracking changes in prices, profits, or any measurable quantities over time. With our Percentage Calculator, you can quickly and accurately compute percentage changes.

How to Calculate Percentage Increase/Decrease Manually

1. Determine the Original and New Values: Start with the original value and the new value.
   
   Example: Original Value = 100, New Value = 120
2. Find the Difference Between the Values: Subtract the original value from the new value (or vice versa for a decrease).
   
   Formula: Difference = New Value - Original Value
   Example (Increase): 120 - 100 = 20
3. Divide the Difference by the Original Value: Divide the calculated difference by the original value to find the proportion of change.
   
   Formula: Proportion = Difference ÷ Original Value
   Example: 20 ÷ 100 = 0.2
4. Multiply by 100 to Get the Percentage: Multiply the proportion by 100 to convert it to a percentage.
   
   Formula: Percentage = Proportion × 100
   Example: 0.2 × 100 = 20%
5. Label the Result as Increase or Decrease: If the new value is higher, it's a percentage increase; if lower, it's a percentage decrease.
   
   Example: 20% Increase

Using the Percentage Calculator

Why do it manually when you can do it faster? With our online Percentage Calculator, simply:

• Enter the original and new values.
• Click Calculate, and get your result instantly!

Real-Life Examples of Percentage Increase/Decrease

1. Shopping: Calculating a price increase.
   
   Example: A product's price rises from 50 to 60. Percentage Increase
   ((60 - 50) ÷ 50) × 100 = 20%.
2. Finance: Analyzing changes in stock prices.
   
   Example: A stock drops from 150 to 120. Percentage Decrease is
   ((150 - 120) ÷ 150) × 100 = 20%.
3. Health: Tracking weight changes.
   
   Example: Weight increases from 70kg to 77kg. Percentage Increase is
   ((77 - 70) ÷ 70) × 100 = 10%.