-39.88% is the change from 845 to 508
Calculation steps:
[( 508 - 845 ) ÷ 845] x 100 = -39.88%
Formula
Percentage change = [(508 - 845) / 845] x 100
Subtract the new number by the original number
508 - 845 = -337
-337 ÷ 845 = -0.3988165680473373
-0.3988165680473373 x 100 = -39.88%