-60.48% is the change from 830 to 328
Calculation steps:
[( 328 - 830 ) ÷ 830] x 100 = -60.48%
Formula
Percentage change = [(328 - 830) / 830] x 100
Subtract the new number by the original number
328 - 830 = -502
-502 ÷ 830 = -0.6048192771084338
-0.6048192771084338 x 100 = -60.48%