-40.12% is the change from 845 to 506
Calculation steps:
[( 506 - 845 ) ÷ 845] x 100 = -40.12%
Formula
Percentage change = [(506 - 845) / 845] x 100
Subtract the new number by the original number
506 - 845 = -339
-339 ÷ 845 = -0.4011834319526627
-0.4011834319526627 x 100 = -40.12%