-75.78% is the change from 830 to 201
Calculation steps:
[( 201 - 830 ) ÷ 830] x 100 = -75.78%
Formula
Percentage change = [(201 - 830) / 830] x 100
Subtract the new number by the original number
201 - 830 = -629
-629 ÷ 830 = -0.7578313253012048
-0.7578313253012048 x 100 = -75.78%