-31.57% is the change from 811 to 555
Calculation steps:
[( 555 - 811 ) ÷ 811] x 100 = -31.57%
Formula
Percentage change = [(555 - 811) / 811] x 100
Subtract the new number by the original number
555 - 811 = -256
-256 ÷ 811 = -0.3156596794081381
-0.3156596794081381 x 100 = -31.57%