percent change formula

Percent Change Calculator – Calculate Percent Increase or Decrease Instantly

This Percent Change Calculator makes it easy to calculate the percent increase or percent decrease between two numbers. Whether you’re analyzing prices, financial trends, weight changes, business performance, or school grades, this tool gives you instant and accurate results.

Simply enter the original value and the new value, and the calculator automatically displays:

• Percent change (increase or decrease)
• Absolute change
• Type of change (increase, decrease, or no change)

This tool helps students, analysts, business owners, and anyone who needs quick percentage calculations.

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Percent Change Formula

The standard formula used to calculate percent change is:$$\text{Percent Change} = \left( \frac{\text{New Value} – \text{Original Value}}{\text{Original Value}} \right) \times 100$$Percent Change=(Original ValueNew Value−Original Value​)×100

If the result is positive → Percent Increase

If the result is negative → Percent Decrease

If the result equals zero → No Change

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How to Use the Percent Change Calculator

1. Enter the original value

Example: 50, 120, 1000

2. Enter the new value

Example: 80, 90, 950

3. Click “Calculate Percent Change”

The calculator instantly shows:

• Percent change
• Absolute difference
• Whether it is an increase or decrease

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Example Percent Change Calculations

✔ Example 1: Price Increase

Original: 50
New: 80$$\frac{80 – 50}{50} \times 100 = 60\%$$5080−50​×100=60%

Result: 60% increase

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✔ Example 2: Price Decrease

Original: 120
New: 90$$\frac{90 – 120}{120} \times 100 = -25\%$$12090−120​×100=−25%

Result: 25% decrease

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✔ Example 3: Weight Progress

Original: 180 lbs
New: 170 lbs$$\text{Percent Change} = -5.56\%$$Percent Change=−5.56%

Result: 5.56% decrease

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✔ Example 4: Business Sales Growth

Original: $5,000
New: $6,500$$\frac{6500 – 5000}{5000} \times 100 = 30\%$$50006500−5000​×100=30%

Result: 30% increase

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Why Use This Percent Change Calculator?

Perfect for:

• Finance and investments
• Retail price comparisons
• Business growth tracking
• Fitness and weight changes
• School or grading analysis
• Data analysis and statistics
• Budgeting and forecasting
• Inflation or cost changes

Benefits:

✔ Instant percent increase or decrease
✔ Works with positive and negative values
✔ Shows absolute difference and change type
✔ Accurate formula-based calculations
✔ Beginner-friendly and mobile-optimized
✔ Helps in making fast, informed decisions

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Frequently Asked Questions (FAQ)

1. What does percent increase mean?

It means the new value is higher than the original value.

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2. What does percent decrease mean?

It means the new value is lower than the original value.

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3. Can percent change be negative?

Yes — negative percent change means a decrease.

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4. What if the original value is zero?

Percent change from zero is undefined, because division by zero is not possible.

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5. Can this tool be used for grades?

Absolutely. It works for test scores, assignments, and overall academic improvements.

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6. Can percent change exceed 100%?

Yes. For example, going from 10 to 30 is a 200% increase.