Percentage Decrease Calculator

Our percentage decrease calculator measures how much a value has reduced as a percentage. Use it to track price drops, salary reductions, discount savings, or any decrease between two values.

% Decrease = ((Original Value - New Value) ÷ Original Value) × 100

Example: Price drops from 800 to 600: ((800 - 600) ÷ 800) × 100 = 25% decrease

How to Calculate Percentage Decrease

Enter original value — the starting or previous value.
Enter new value — the current or reduced value.
Click Calculate to see the percentage decrease, absolute change, and breakdown.

Common Percentage Decrease Examples

Price discount: 1200 to 900 = 25% decrease
Sale offer: 2000 to 1400 = 30% decrease
Weight loss: 80kg to 72kg = 10% decrease
Cost reduction: 50,000 to 40,000 = 20% decrease
Stock price drop: 150 to 120 = 20% decrease

Frequently Asked Questions

How do I calculate percentage decrease?

Formula: ((Original Value - New Value) ÷ Original Value) × 100. Example: Price drops from 800 to 600: ((800-600) ÷ 800) × 100 = 25% decrease.

What is a significant percentage decrease?

Any decrease over 10% is significant in most contexts. For prices, 20-50% is a major sale. For business metrics, a 10%+ decrease needs investigation.

Can percentage decrease be more than 100%?

No, percentage decrease cannot exceed 100%. A 100% decrease means the value dropped to zero. You cannot go below zero.

How do I calculate percentage decrease in price?

Use: ((Original Price - New Price) ÷ Original Price) × 100. Example: Shirt price goes from 1200 to 900: ((1200-900) ÷ 1200) × 100 = 25% decrease.

How do I calculate percentage decrease in salary?

Formula: ((Old Salary - New Salary) ÷ Old Salary) × 100. Example: Salary goes from 60,000 to 54,000: ((60000-54000) ÷ 60000) × 100 = 10% decrease.

How do I find original value given percentage decrease?

Formula: Original = New Value ÷ (1 - percentage/100). Example: If price is 600 after 25% decrease: Original = 600 ÷ 0.75 = 800.

What is the difference between percentage decrease and percentage loss?

Percentage decrease measures any reduction. Percentage loss specifically refers to financial losses. The formula is the same: ((Original - New) ÷ Original) × 100.

How do I calculate cumulative percentage decrease?

Apply decreases sequentially: Final = Original × (1 - rate1) × (1 - rate2). Example: 10% then 20% decrease on 1000: 1000 × 0.9 × 0.8 = 720. Total decrease = 28%.

How do I calculate percentage decrease from a negative number?

Example: From -100 to -50. Decrease = (-100) - (-50) = -50. Use absolute values: (|-100| - |-50|) ÷ |-100| × 100 = 50% decrease in magnitude.

What is a 50% decrease?

A 50% decrease means the value is halved. 50% decrease of 400 = 400 - (0.5 × 400) = 400 - 200 = 200. Formula: New = Original × 0.5.

Percentage Decrease Calculator