-39.56% is the change from 455 to 275
Calculation steps:
[( 275 - 455 ) ÷ 455] x 100 = -39.56%
Formula
Percentage change = [(275 - 455) / 455] x 100
Subtract the new number by the original number
275 - 455 = -180
-180 ÷ 455 = -0.3956043956043956
-0.3956043956043956 x 100 = -39.56%