-38.31% is the change from 817 to 504
Calculation steps:
[( 504 - 817 ) ÷ 817] x 100 = -38.31%
Formula
Percentage change = [(504 - 817) / 817] x 100
Subtract the new number by the original number
504 - 817 = -313
-313 ÷ 817 = -0.38310893512851896
-0.38310893512851896 x 100 = -38.31%