1. What is a Percentage Decrease Calculator?

Definition: This calculator determines the percentage decrease between an old value and a new value.

Purpose: It helps quantify reductions in values like prices, quantities, or measurements as a percentage change.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Old — Original value before decrease
• New — Value after decrease
• Decrease — Percentage reduction (result)

Explanation: The difference between old and new values is divided by the old value, then multiplied by 100 to convert to percentage.

3. Importance of Percentage Decrease Calculation

Details: Percentage decrease is crucial for analyzing price reductions, performance drops, efficiency losses, or any measurable decline.

4. Using the Calculator

Tips: Enter the original (old) value and the new value. Both must be positive numbers, and old value must be greater than new value to show a decrease.

5. Frequently Asked Questions (FAQ)

Q1: What if my new value is higher than the old value?
A: The calculator will show 0% decrease as it only calculates reductions, not increases.

Q2: Can I use this for price decreases?
A: Yes, this is commonly used to calculate price drops, discounts, or sale percentages.

Q3: Why does the formula divide by the old value?
A: This normalizes the decrease relative to the original value, making percentages comparable across different scales.

Q4: What's the difference between percentage decrease and percentage difference?
A: Percentage decrease only shows reductions, while percentage difference can show both increases and decreases.

Q5: How precise are the results?
A: Results are shown with 2 decimal places for percentage values.