-83.1% is the change from 858 to 145
Calculation steps:
[( 145 - 858 ) ÷ 858] x 100 = -83.1%
Formula
Percentage change = [(145 - 858) / 858] x 100
Subtract the new number by the original number
145 - 858 = -713
-713 ÷ 858 = -0.831002331002331
-0.831002331002331 x 100 = -83.1%