-71.79% is the change from 858 to 242
Calculation steps:
[( 242 - 858 ) ÷ 858] x 100 = -71.79%
Formula
Percentage change = [(242 - 858) / 858] x 100
Subtract the new number by the original number
242 - 858 = -616
-616 ÷ 858 = -0.717948717948718
-0.717948717948718 x 100 = -71.79%