-60.65% is the change from 648 to 255
Calculation steps:
[( 255 - 648 ) ÷ 648] x 100 = -60.65%
Formula
Percentage change = [(255 - 648) / 648] x 100
Subtract the new number by the original number
255 - 648 = -393
-393 ÷ 648 = -0.6064814814814815
-0.6064814814814815 x 100 = -60.65%