Percentage Increase/Decrease Calculator

The percentage change between two numbers.

Overview

Calculates the percentage increase or percentage decrease between an original starting value and a final new value.

Formula & Calculation Method

Percentage Change (%) = ((New Value - Old Value) / |Old Value|) × 100

A positive result indicates a percentage increase; a negative result represents a percentage decrease.

Worked Example: Revenue Increasing from ₹80,000 to ₹1,00,000

Inputs: Old Value = ₹80,000 | New Value = ₹1,00,000

  • Absolute change = 1,00,000 - 80,000 = +20,000
  • Divide by original value = 20,000 / 80,000 = 0.25
  • Multiply by 100 = 0.25 × 100 = +25.0% increase

Summary: Old = 80,000 | New = 1,00,000 | Percentage Change = +25.0% Increase

Common Use Cases

  • Financial Reporting: Track month-over-month growth in website traffic, sales conversions, and business revenues.
  • Investment Performance: Calculate asset appreciation or drawdown percentages on equity and mutual fund holdings.
  • Retail Price Tracking: Measure inflation spikes or seasonal discounts on consumer goods.

Frequently Asked Questions

Why doesn't a 50% loss break even with a 50% gain?

If ₹100 drops 50%, you have ₹50; gaining 50% on ₹50 brings you to ₹75, leaving a net 25% loss from your initial ₹100.

Can percentage change be negative?

Yes, any reduction in value produces a negative percentage change, representing a decrease.

How do I calculate percentage decrease?

Subtract the new value from the old value, divide by the old value, and multiply by 100.

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