-23.18% is the change from 811 to 623
Calculation steps:
[( 623 - 811 ) ÷ 811] x 100 = -23.18%
Formula
Percentage change = [(623 - 811) / 811] x 100
Subtract the new number by the original number
623 - 811 = -188
-188 ÷ 811 = -0.2318125770653514
-0.2318125770653514 x 100 = -23.18%