-31.94% is the change from 454 to 309
Calculation steps:
[( 309 - 454 ) ÷ 454] x 100 = -31.94%
Formula
Percentage change = [(309 - 454) / 454] x 100
Subtract the new number by the original number
309 - 454 = -145
-145 ÷ 454 = -0.31938325991189426
-0.31938325991189426 x 100 = -31.94%