-70.05% is the change from 858 to 257
Calculation steps:
[( 257 - 858 ) ÷ 858] x 100 = -70.05%
Formula
Percentage change = [(257 - 858) / 858] x 100
Subtract the new number by the original number
257 - 858 = -601
-601 ÷ 858 = -0.7004662004662005
-0.7004662004662005 x 100 = -70.05%