-18.25% is the change from 811 to 663
Calculation steps:
[( 663 - 811 ) ÷ 811] x 100 = -18.25%
Formula
Percentage change = [(663 - 811) / 811] x 100
Subtract the new number by the original number
663 - 811 = -148
-148 ÷ 811 = -0.18249075215782984
-0.18249075215782984 x 100 = -18.25%