How to Calculate Percentage Increase & Decrease
Introduction
Understanding percentage increase and decrease is important for daily life. Whether you are calculating discounts, salary growth, or price changes, percentages help you make better decisions.
In this guide, you will learn simple formulas, step-by-step calculations, and examples.
What is Percentage Increase?
Percentage increase shows how much a value has increased compared to its original value.
Percentage Increase Formula
Percentage Increase =
(New Value – Original Value) ÷ Original Value × 100
Example of Percentage Increase
Original Price = ₹100
New Price = ₹150
Increase = 150 – 100 = 50
Percentage Increase = (50 ÷ 100) × 100 = 50%
What is Percentage Decrease?
Percentage decrease shows how much a value has reduced compared to its original value.
Percentage Decrease Formula
Percentage Decrease =
(Original Value – New Value) ÷ Original Value × 100
Example of Percentage Decrease
Original Price = ₹200
New Price = ₹150
Decrease = 200 – 150 = 50
Percentage Decrease = (50 ÷ 200) × 100 = 25%
Use Percentage Calculator (Easy Method)
Instead of calculating manually, you can use an online tool.
Try our: Percentage Calculator
Real-Life Uses of Percentage
- Shopping discounts
- Salary increments
- Business profit/loss
- Investment growth
Common Mistakes to Avoid
- Using wrong base value
- Forgetting to multiply by 100
- Mixing increase and decrease formulas
What Your Results Mean
The percentage result helps you understand how much change has occurred compared to the original value. This makes it easier to compare values and make decisions.
Conclusion
Percentage calculations are simple once you understand the formulas. With practice or by using a calculator, you can solve problems quickly and accurately.