-71.7% is the change from 855 to 242
Calculation steps:
[( 242 - 855 ) ÷ 855] x 100 = -71.7%
Formula
Percentage change = [(242 - 855) / 855] x 100
Subtract the new number by the original number
242 - 855 = -613
-613 ÷ 855 = -0.7169590643274854
-0.7169590643274854 x 100 = -71.7%