-29.01% is the change from 455 to 323
Calculation steps:
[( 323 - 455 ) ÷ 455] x 100 = -29.01%
Formula
Percentage change = [(323 - 455) / 455] x 100
Subtract the new number by the original number
323 - 455 = -132
-132 ÷ 455 = -0.29010989010989013
-0.29010989010989013 x 100 = -29.01%