How to Calculate Percentage Increase — Formula + 10 Examples

⚡ RESPUESTA RÁPIDA

Formula: Percentage Increase = ((New Value − Old Value) ÷ Old Value) × 100. Example: from $50 to $65 → ((65−50)÷50)×100 = 30% increase. Always divide by the ORIGINAL value.

Step-by-Step Method

Find the differenceNew Value − Old Value = the amount of increase. $65 − $50 = $15.

Divide by the original value$15 ÷ $50 = 0.30

Multiply by 1000.30 × 100 = 30% increase. If negative → it's a decrease.

10 Real Examples

Salary $14k→$16.1k

+15%

Price $80→$100

+25%

$200→$250

+25%

$1,000→$1,080

+8%

50→73 students

+46%

$8.50→$9.35

+10%

$45→$54

+20%

$500→$650

+30%

100→115

+15%

$3,000→$3,600

+20%

Common Mistakes

Using the new value as denominator: always divide by the ORIGINAL (starting) value, not the final one.
Forgetting to multiply by 100: 0.30 is the decimal form — multiply by 100 to get 30%.
Adding percentage increases: two consecutive +10% raises give +21%, not +20%, because the second applies to the already-raised value.

Percentage Increase vs Percentage Change

Percentage increase only applies when the new value is higher. For any direction (up or down), use percentage change. The formula is identical — the sign tells you which it is.