-19.85% is the change from 811 to 650
Calculation steps:
[( 650 - 811 ) ÷ 811] x 100 = -19.85%
Formula
Percentage change = [(650 - 811) / 811] x 100
Subtract the new number by the original number
650 - 811 = -161
-161 ÷ 811 = -0.19852034525277434
-0.19852034525277434 x 100 = -19.85%