-40% is the change from 825 to 495
Calculation steps:
[( 495 - 825 ) ÷ 825] x 100 = -40%
Formula
Percentage change = [(495 - 825) / 825] x 100
Subtract the new number by the original number
495 - 825 = -330
-330 ÷ 825 = -0.4
-0.4 x 100 = -40%
Example