-23.42% is the change from 333 to 255
Calculation steps:
[( 255 - 333 ) ÷ 333] x 100 = -23.42%
Formula
Percentage change = [(255 - 333) / 333] x 100
Subtract the new number by the original number
255 - 333 = -78
-78 ÷ 333 = -0.23423423423423423
-0.23423423423423423 x 100 = -23.42%