-96.85% is the change from 858 to 27
Calculation steps:
[( 27 - 858 ) ÷ 858] x 100 = -96.85%
Formula
Percentage change = [(27 - 858) / 858] x 100
Subtract the new number by the original number
27 - 858 = -831
-831 ÷ 858 = -0.9685314685314685
-0.9685314685314685 x 100 = -96.85%