-60.72% is the change from 830 to 326
Calculation steps:
[( 326 - 830 ) ÷ 830] x 100 = -60.72%
Formula
Percentage change = [(326 - 830) / 830] x 100
Subtract the new number by the original number
326 - 830 = -504
-504 ÷ 830 = -0.6072289156626506
-0.6072289156626506 x 100 = -60.72%