-81.52% is the change from 817 to 151
Calculation steps:
[( 151 - 817 ) ÷ 817] x 100 = -81.52%
Formula
Percentage change = [(151 - 817) / 817] x 100
Subtract the new number by the original number
151 - 817 = -666
-666 ÷ 817 = -0.8151774785801713
-0.8151774785801713 x 100 = -81.52%