-32.97% is the change from 455 to 305
Calculation steps:
[( 305 - 455 ) ÷ 455] x 100 = -32.97%
Formula
Percentage change = [(305 - 455) / 455] x 100
Subtract the new number by the original number
305 - 455 = -150
-150 ÷ 455 = -0.32967032967032966
-0.32967032967032966 x 100 = -32.97%