-81.76% is the change from 817 to 149
Calculation steps:
[( 149 - 817 ) ÷ 817] x 100 = -81.76%
Formula
Percentage change = [(149 - 817) / 817] x 100
Subtract the new number by the original number
149 - 817 = -668
-668 ÷ 817 = -0.817625458996328
-0.817625458996328 x 100 = -81.76%