Percentage decrease helps you understand how much a value has reduced compared to its original value. It is commonly used in discounts, price drops, loss calculations, and financial analysis.
If you want to understand the basics, you can first learn how to calculate percentage step by step.
What is Percentage Decrease?
Percentage decrease shows the reduction in value as a percentage of the original amount.
Percentage Decrease Formula
Example 1: Price Drop
Old price = ₹500 New price = ₹400
Decrease = 500 – 400 = 100
Percentage decrease = (100 / 500) × 100 = 20%
Example 2: Discount Calculation
Original price = ₹2000 Discounted price = ₹1500
Decrease = ₹500
Percentage decrease = (500 / 2000) × 100 = 25%
Example 3: Marks Reduction
Old marks = 80 New marks = 60
Decrease = 20
Percentage decrease = (20 / 80) × 100 = 25%
Percentage Increase vs Percentage Decrease
Percentage increase shows growth, while percentage decrease shows reduction. Both are calculated using similar formulas but used in different situations.
Quick Comparison Table
| Old Value | New Value | Decrease |
|---|---|---|
| 500 | 400 | 20% |
| 2000 | 1500 | 25% |
| 1000 | 900 | 10% |
How to Calculate Percentage Decrease Step-by-Step
- Find the difference (Old – New)
- Divide by original value
- Multiply by 100
Real-Life Uses of Percentage Decrease
- Shopping discounts
- Price reductions
- Business losses
- Market decline
Common Mistakes to Avoid
- Using new value as base instead of old value
- Forgetting to multiply by 100
- Mixing up increase and decrease formulas
Use Our Calculator
To make your calculations faster and more accurate, you can use our calculator available on this page.
Simply enter your values and get instant results without manual calculation.