-18.66% is the change from 997 to 811
Calculation steps:
[( 811 - 997 ) ÷ 997] x 100 = -18.66%
Formula
Percentage change = [(811 - 997) / 997] x 100
Subtract the new number by the original number
811 - 997 = -186
-186 ÷ 997 = -0.18655967903711135
-0.18655967903711135 x 100 = -18.66%