Percentage increase/decrease calculator

Initial amount:
Final amount:
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Percentage increase/decrease:		%
Calculation:

 

Initial amount:
Percentage increase/decrease:	%
	Calculate Reset
Absolute difference:
Final amount:
Calculation:

Percentage calculator ►

Percentage increase/decrease calculation

The percentage increase/decrease from old value (V_old) to new value (V_new) is equal to the old and new values difference divided by the old value times 100%:

percentage increase/decrease = (V_new - V_old) / V_old × 100%

Example #1

Price percentage increase from old value of $1000 to new value of $1200 is caluclated by:

percentage increase = ($1200 - $1000) / $1000 × 100%

 = 0.2 × 100% = 20%

Example #2

Price percentage decrease from old value of $1000 to new value of $800 is caluclated by:

percentage decrease = ($800 - $1000) / $1000 × 100%

 = -0.2 × 100% = -20%

Difference and final value calculation

The difference d is equal to the initial value V₀ times the percentage increase/decrease p divided by 100:

d = V₀ × p / 100

The final value V₁ is equal to the initial value V₀ plus the difference d:

V₁ = V₀ + d

 

Percentage calculator ►

 

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See also

• Percentage calculator
• Percent error calculator