-43.82% is the change from 906 to 509
Calculation steps:
[( 509 - 906 ) ÷ 906] x 100 = -43.82%
Formula
Percentage change = [(509 - 906) / 906] x 100
Subtract the new number by the original number
509 - 906 = -397
-397 ÷ 906 = -0.4381898454746137
-0.4381898454746137 x 100 = -43.82%