-57.71% is the change from 603 to 255
Calculation steps:
[( 255 - 603 ) ÷ 603] x 100 = -57.71%
Formula
Percentage change = [(255 - 603) / 603] x 100
Subtract the new number by the original number
255 - 603 = -348
-348 ÷ 603 = -0.5771144278606966
-0.5771144278606966 x 100 = -57.71%