-32.75% is the change from 455 to 306
Calculation steps:
[( 306 - 455 ) ÷ 455] x 100 = -32.75%
Formula
Percentage change = [(306 - 455) / 455] x 100
Subtract the new number by the original number
306 - 455 = -149
-149 ÷ 455 = -0.3274725274725275
-0.3274725274725275 x 100 = -32.75%