-32.89% is the change from 456 to 306
Calculation steps:
[( 306 - 456 ) ÷ 456] x 100 = -32.89%
Formula
Percentage change = [(306 - 456) / 456] x 100
Subtract the new number by the original number
306 - 456 = -150
-150 ÷ 456 = -0.32894736842105265
-0.32894736842105265 x 100 = -32.89%