-19.93% is the change from 823 to 659
Calculation steps:
[( 659 - 823 ) ÷ 823] x 100 = -19.93%
Formula
Percentage change = [(659 - 823) / 823] x 100
Subtract the new number by the original number
659 - 823 = -164
-164 ÷ 823 = -0.19927095990279464
-0.19927095990279464 x 100 = -19.93%