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Read more →Percentage Decrease Calculator
Calculate how much a value has dropped as a percentage. Perfect for analyzing losses and performance declines.
Calculate Value Losses – Find Percentage Decreases
Percentage Decrease Calculator
How to Calculate Percentage Decrease
- Enter the original (starting) value.
- Enter the new value after the decrease.
- Click Calculate to see the percentage decrease.
Formula:
Percentage Decrease = ((Original Value − New Value) ÷ Original Value) × 100Understanding Percentage Decrease
Percentage decrease measures how much a value has dropped relative to its starting point. Whether analyzing investment losses, tracking weight loss, or monitoring business performance, understanding percentage decrease helps you quantify reductions.
Unlike simple subtraction, percentage decrease reveals proportional change. A $100 decrease affects a $1,000 investment differently than a $10,000 investment.
When You Use This Calculator
- Financial Analysis: Track investment losses and portfolio declines
- Health & Wellness: Monitor weight loss and fitness progress
- Business Performance: Analyze sales drops and revenue reductions
- Resource Management: Measure energy savings and waste reduction
Formula
Percentage Decrease = ((Original − New) ÷ Original) × 100Common Examples
Stock price drops: From $100 to $75 per share
Result: 25% decrease
Weight loss: From 200 lbs to 150 lbs
Result: 25% decrease
Sales decline: From $80,000 to $60,000
Result: 25% decrease
Energy use: From 500 kWh to 350 kWh
Result: 30% decrease
Frequently Asked Questions
How do I calculate percentage decrease?
Subtract the new value from original, divide by original, multiply by 100. Formula: ((Original − New) ÷ Original) × 100.
What if my result is negative?
Negative means the value increased, not decreased. Use the Percentage Increase calculator instead.
Why can't I calculate from zero?
Division by zero is undefined mathematically. The original value must be non-zero.
Is percentage decrease the same as a discount?
Yes, they use identical formulas. A 25% decrease in price equals a 25% discount.
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