Percentage Decrease Calculator
Calculate the percentage decrease between two values
How to Use This Calculator
Enter Original Value
Type the starting value before the decrease occurred.
Enter New Value
Type the final value after the decrease (must be smaller than original).
View Results
See the percentage decrease and the actual reduction amount.
Formula
Percentage Decrease = ((Original Value - New Value) / Original Value) × 100
Example 1: Price drop from $100 to $75
Decrease = ((100 - 75) / 100) × 100
Decrease = (25 / 100) × 100
Decrease = 25%
The price decreased by 25%
Example 2: Weight loss from 200 lbs to 180 lbs
Decrease = ((200 - 180) / 200) × 100
Decrease = (20 / 200) × 100
Decrease = 10%
Weight decreased by 10%
Example 3: Sales drop from $50,000 to $35,000
Decrease = ((50000 - 35000) / 50000) × 100
Decrease = (15000 / 50000) × 100
Decrease = 30%
Sales decreased by 30%
About Percentage Decrease Calculator
The Percentage Decrease Calculator helps you quickly calculate the percent reduction between two values. This tool is essential for analyzing discounts, sales performance, weight loss, expense reduction, and any situation where you need to measure a decline or decrease.
When to Use This Calculator
- Sales & Discounts: Calculate discount percentages for sales and promotions
- Business Analysis: Measure revenue decreases, cost reductions, or market share losses
- Weight Loss: Track weight loss progress as a percentage
- Finance: Calculate investment losses or expense reductions
- Performance Metrics: Measure declines in various KPIs
- Inventory: Track stock reductions and depletion rates
Why Use Our Calculator?
- ✅ Instant Calculations: Get results immediately
- ✅ Shows Reduction Amount: See both percentage and actual decrease
- ✅ 100% Accurate: Precise mathematical calculations
- ✅ Easy to Use: Simple, intuitive interface
- ✅ Completely Free: No registration required
- ✅ Mobile Friendly: Works on all devices
Understanding Percentage Decrease
Percentage decrease measures how much a value has declined relative to its original amount. It's always calculated from the original (larger) value to the new (smaller) value.
- A 50% decrease means the value was cut in half
- A 25% decrease means the value lost a quarter of its original amount
- A 100% decrease means the value reached zero
- The maximum decrease possible is 100%
Real-World Applications
Retail: A $200 jacket is on sale for $150. The percentage decrease is 25%, which can be advertised as "25% off."
Health & Fitness: Someone weighing 180 lbs loses weight to 162 lbs. The 10% decrease shows meaningful progress toward their goal.
Business: Monthly expenses dropped from $10,000 to $8,500. The 15% decrease indicates successful cost-cutting measures.
Tips for Best Results
- Always enter the larger (original) value first
- The new value must be smaller than the original for a decrease
- Use this calculator for reductions, discounts, and losses
- For increases, use the Percentage Increase Calculator instead
- Round percentages appropriately for your use case
Frequently Asked Questions
What if the new value is larger than the original?
That would be a percentage increase, not a decrease. Use our Percentage Increase Calculator for that scenario.
Can percentage decrease exceed 100%?
No. The maximum percentage decrease is 100%, which occurs when the value decreases to zero.
How do I calculate the final price after a percent decrease?
Subtract the decrease amount from the original value. Or multiply the original value by (1 - percentage/100).
Is this the same as a discount percentage?
Yes! When a store offers a discount, it's expressing the percentage decrease from the original price.
Can I use negative numbers?
The calculator works with positive numbers. If you're working with negative values, use their absolute values and interpret results accordingly.