-75.18% is the change from 830 to 206
Calculation steps:
[( 206 - 830 ) ÷ 830] x 100 = -75.18%
Formula
Percentage change = [(206 - 830) / 830] x 100
Subtract the new number by the original number
206 - 830 = -624
-624 ÷ 830 = -0.7518072289156627
-0.7518072289156627 x 100 = -75.18%