-39.11% is the change from 813 to 495
Calculation steps:
[( 495 - 813 ) ÷ 813] x 100 = -39.11%
Formula
Percentage change = [(495 - 813) / 813] x 100
Subtract the new number by the original number
495 - 813 = -318
-318 ÷ 813 = -0.39114391143911437
-0.39114391143911437 x 100 = -39.11%