-23.65% is the change from 334 to 255
Calculation steps:
[( 255 - 334 ) ÷ 334] x 100 = -23.65%
Formula
Percentage change = [(255 - 334) / 334] x 100
Subtract the new number by the original number
255 - 334 = -79
-79 ÷ 334 = -0.23652694610778444
-0.23652694610778444 x 100 = -23.65%