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Lesson 5

Percentage Increase

Calculate percentage increases and growth rates.

  • intermediate

Formula

% Increase = ((New - Original) ÷ Original) × 100

📚 Percentage Increase

A percentage increase tells you how much a value has grown compared to its original amount.

% Increase = ((New - Original) ÷ Original) × 100

Example: Price increased from $50 to $65

1
Find the difference: 65 - 50 = 15
2
Divide by original: 15 ÷ 50 = 0.3
3
Multiply by 100: 0.3 × 100 = 30% increase

Frequently Asked Questions

How do I calculate a percentage increase?

Divide the increase by the original value and multiply by 100: a price that rises from $40 to $50 has gone up 10 ÷ 40 × 100 = 25%.

How do I add a percentage to a number?

Multiply by 1 plus the percentage as a decimal: $40 plus 25% is $40 × 1.25 = $50.

Practice

Work each one out, then check yourself.

  1. Your salary increased from $40,000 to $46,000. What's the percentage increase?

    Hint: Increase is $6,000. Divide by $40,000 and multiply by 100

    Show answer

    15

Final Quiz

0/3

Test what you learned. Pick the correct answer for each question.

  1. A $50 item is increased by 20%. New price?

    A $50 item is increased by 20%. New price?

  2. Salary went from $40,000 to $44,000. Percentage increase?

    Salary went from $40,000 to $44,000. Percentage increase?

  3. Population grows from 1,000 to 1,150. The growth rate is:

    Population grows from 1,000 to 1,150. The growth rate is: