-60.91% is the change from 839 to 328
Calculation steps:
[( 328 - 839 ) ÷ 839] x 100 = -60.91%
Formula
Percentage change = [(328 - 839) / 839] x 100
Subtract the new number by the original number
328 - 839 = -511
-511 ÷ 839 = -0.6090584028605482
-0.6090584028605482 x 100 = -60.91%