-42.95% is the change from 447 to 255
Calculation steps:
[( 255 - 447 ) ÷ 447] x 100 = -42.95%
Formula
Percentage change = [(255 - 447) / 447] x 100
Subtract the new number by the original number
255 - 447 = -192
-192 ÷ 447 = -0.42953020134228187
-0.42953020134228187 x 100 = -42.95%