-21.02% is the change from 823 to 650
Calculation steps:
[( 650 - 823 ) ÷ 823] x 100 = -21.02%
Formula
Percentage change = [(650 - 823) / 823] x 100
Subtract the new number by the original number
650 - 823 = -173
-173 ÷ 823 = -0.21020656136087484
-0.21020656136087484 x 100 = -21.02%