-12.05% is the change from 830 to 730
Calculation steps:
[( 730 - 830 ) ÷ 830] x 100 = -12.05%
Formula
Percentage change = [(730 - 830) / 830] x 100
Subtract the new number by the original number
730 - 830 = -100
-100 ÷ 830 = -0.12048192771084337
-0.12048192771084337 x 100 = -12.05%