-76.02% is the change from 830 to 199
Calculation steps:
[( 199 - 830 ) ÷ 830] x 100 = -76.02%
Formula
Percentage change = [(199 - 830) / 830] x 100
Subtract the new number by the original number
199 - 830 = -631
-631 ÷ 830 = -0.7602409638554217
-0.7602409638554217 x 100 = -76.02%