-93.57% is the change from 855 to 55
Calculation steps:
[( 55 - 855 ) ÷ 855] x 100 = -93.57%
Formula
Percentage change = [(55 - 855) / 855] x 100
Subtract the new number by the original number
55 - 855 = -800
-800 ÷ 855 = -0.935672514619883
-0.935672514619883 x 100 = -93.57%