-29.13% is the change from 817 to 579
Calculation steps:
[( 579 - 817 ) ÷ 817] x 100 = -29.13%
Formula
Percentage change = [(579 - 817) / 817] x 100
Subtract the new number by the original number
579 - 817 = -238
-238 ÷ 817 = -0.2913096695226438
-0.2913096695226438 x 100 = -29.13%