-32.15% is the change from 451 to 306
Calculation steps:
[( 306 - 451 ) ÷ 451] x 100 = -32.15%
Formula
Percentage change = [(306 - 451) / 451] x 100
Subtract the new number by the original number
306 - 451 = -145
-145 ÷ 451 = -0.3215077605321508
-0.3215077605321508 x 100 = -32.15%