-40.75% is the change from 859 to 509
Calculation steps:
[( 509 - 859 ) ÷ 859] x 100 = -40.75%
Formula
Percentage change = [(509 - 859) / 859] x 100
Subtract the new number by the original number
509 - 859 = -350
-350 ÷ 859 = -0.4074505238649593
-0.4074505238649593 x 100 = -40.75%