-81.27% is the change from 817 to 153
Calculation steps:
[( 153 - 817 ) ÷ 817] x 100 = -81.27%
Formula
Percentage change = [(153 - 817) / 817] x 100
Subtract the new number by the original number
153 - 817 = -664
-664 ÷ 817 = -0.8127294981640147
-0.8127294981640147 x 100 = -81.27%