-39.21% is the change from 811 to 493
Calculation steps:
[( 493 - 811 ) ÷ 811] x 100 = -39.21%
Formula
Percentage change = [(493 - 811) / 811] x 100
Subtract the new number by the original number
493 - 811 = -318
-318 ÷ 811 = -0.3921085080147966
-0.3921085080147966 x 100 = -39.21%