-35.28% is the change from 394 to 255
Calculation steps:
[( 255 - 394 ) ÷ 394] x 100 = -35.28%
Formula
Percentage change = [(255 - 394) / 394] x 100
Subtract the new number by the original number
255 - 394 = -139
-139 ÷ 394 = -0.35279187817258884
-0.35279187817258884 x 100 = -35.28%