The Percentage Change Calculator (% change calculator) will quantify the change from one number to another and express the change as an increase or decrease. This is a % change calculator. From 10 apples to 20 apples is a 100% increase (change) in the number of apples.
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%
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%
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%