-89.01% is the change from 455 to 50
Calculation steps:
[( 50 - 455 ) ÷ 455] x 100 = -89.01%
Formula
Percentage change = [(50 - 455) / 455] x 100
Subtract the new number by the original number
50 - 455 = -405
-405 ÷ 455 = -0.8901098901098901
-0.8901098901098901 x 100 = -89.01%