-68.44% is the change from 808 to 255
Calculation steps:
[( 255 - 808 ) ÷ 808] x 100 = -68.44%
Formula
Percentage change = [(255 - 808) / 808] x 100
Subtract the new number by the original number
255 - 808 = -553
-553 ÷ 808 = -0.6844059405940595
-0.6844059405940595 x 100 = -68.44%