-40.65% is the change from 834 to 495
Calculation steps:
[( 495 - 834 ) ÷ 834] x 100 = -40.65%
Formula
Percentage change = [(495 - 834) / 834] x 100
Subtract the new number by the original number
495 - 834 = -339
-339 ÷ 834 = -0.4064748201438849
-0.4064748201438849 x 100 = -40.65%