-95.34% is the change from 858 to 40
Calculation steps:
[( 40 - 858 ) ÷ 858] x 100 = -95.34%
Formula
Percentage change = [(40 - 858) / 858] x 100
Subtract the new number by the original number
40 - 858 = -818
-818 ÷ 858 = -0.9533799533799534
-0.9533799533799534 x 100 = -95.34%