-32.65% is the change from 830 to 559
Calculation steps:
[( 559 - 830 ) ÷ 830] x 100 = -32.65%
Formula
Percentage change = [(559 - 830) / 830] x 100
Subtract the new number by the original number
559 - 830 = -271
-271 ÷ 830 = -0.3265060240963855
-0.3265060240963855 x 100 = -32.65%