-40.21% is the change from 843 to 504
Calculation steps:
[( 504 - 843 ) ÷ 843] x 100 = -40.21%
Formula
Percentage change = [(504 - 843) / 843] x 100
Subtract the new number by the original number
504 - 843 = -339
-339 ÷ 843 = -0.40213523131672596
-0.40213523131672596 x 100 = -40.21%