-37.36% is the change from 811 to 508
Calculation steps:
[( 508 - 811 ) ÷ 811] x 100 = -37.36%
Formula
Percentage change = [(508 - 811) / 811] x 100
Subtract the new number by the original number
508 - 811 = -303
-303 ÷ 811 = -0.37361282367447596
-0.37361282367447596 x 100 = -37.36%