-29.32% is the change from 457 to 323
Calculation steps:
[( 323 - 457 ) ÷ 457] x 100 = -29.32%
Formula
Percentage change = [(323 - 457) / 457] x 100
Subtract the new number by the original number
323 - 457 = -134
-134 ÷ 457 = -0.29321663019693656
-0.29321663019693656 x 100 = -29.32%