-93.41% is the change from 455 to 30
Calculation steps:
[( 30 - 455 ) ÷ 455] x 100 = -93.41%
Formula
Percentage change = [(30 - 455) / 455] x 100
Subtract the new number by the original number
30 - 455 = -425
-425 ÷ 455 = -0.9340659340659341
-0.9340659340659341 x 100 = -93.41%