-38.72% is the change from 811 to 497
Calculation steps:
[( 497 - 811 ) ÷ 811] x 100 = -38.72%
Formula
Percentage change = [(497 - 811) / 811] x 100
Subtract the new number by the original number
497 - 811 = -314
-314 ÷ 811 = -0.3871763255240444
-0.3871763255240444 x 100 = -38.72%