-85.9% is the change from 858 to 121
Calculation steps:
[( 121 - 858 ) ÷ 858] x 100 = -85.9%
Formula
Percentage change = [(121 - 858) / 858] x 100
Subtract the new number by the original number
121 - 858 = -737
-737 ÷ 858 = -0.8589743589743589
-0.8589743589743589 x 100 = -85.9%