-74.94% is the change from 858 to 215
Calculation steps:
[( 215 - 858 ) ÷ 858] x 100 = -74.94%
Formula
Percentage change = [(215 - 858) / 858] x 100
Subtract the new number by the original number
215 - 858 = -643
-643 ÷ 858 = -0.7494172494172494
-0.7494172494172494 x 100 = -74.94%