-40.36% is the change from 845 to 504
Calculation steps:
[( 504 - 845 ) ÷ 845] x 100 = -40.36%
Formula
Percentage change = [(504 - 845) / 845] x 100
Subtract the new number by the original number
504 - 845 = -341
-341 ÷ 845 = -0.4035502958579882
-0.4035502958579882 x 100 = -40.36%