-19.73% is the change from 811 to 651
Calculation steps:
[( 651 - 811 ) ÷ 811] x 100 = -19.73%
Formula
Percentage change = [(651 - 811) / 811] x 100
Subtract the new number by the original number
651 - 811 = -160
-160 ÷ 811 = -0.19728729963008632
-0.19728729963008632 x 100 = -19.73%