-78.21% is the change from 858 to 187
Calculation steps:
[( 187 - 858 ) ÷ 858] x 100 = -78.21%
Formula
Percentage change = [(187 - 858) / 858] x 100
Subtract the new number by the original number
187 - 858 = -671
-671 ÷ 858 = -0.782051282051282
-0.782051282051282 x 100 = -78.21%