-80.05% is the change from 817 to 163
Calculation steps:
[( 163 - 817 ) ÷ 817] x 100 = -80.05%
Formula
Percentage change = [(163 - 817) / 817] x 100
Subtract the new number by the original number
163 - 817 = -654
-654 ÷ 817 = -0.8004895960832313
-0.8004895960832313 x 100 = -80.05%