-44.2% is the change from 457 to 255
Calculation steps:
[( 255 - 457 ) ÷ 457] x 100 = -44.2%
Formula
Percentage change = [(255 - 457) / 457] x 100
Subtract the new number by the original number
255 - 457 = -202
-202 ÷ 457 = -0.4420131291028446
-0.4420131291028446 x 100 = -44.2%