-58.51% is the change from 817 to 339
Calculation steps:
[( 339 - 817 ) ÷ 817] x 100 = -58.51%
Formula
Percentage change = [(339 - 817) / 817] x 100
Subtract the new number by the original number
339 - 817 = -478
-478 ÷ 817 = -0.5850673194614443
-0.5850673194614443 x 100 = -58.51%