Percentage change calculator
[Math_m_Percentage_change_calculator]
Percentage change calculation
The percentage change from old value (Vold) to new value (Vnew) is equal to the old and new values difference divided by the old value times 100%:
percentage change = (Vnew – Vold) / Vold × 100%
Example #1
Price percentage increase from old value of 1000$ to new value of 1200$ is caluclated by:
percentage change = (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 change = (800$ – 1000$) / 1000$ × 100%
= -0.2 × 100% = -20%