-29.4% is the change from 830 to 586
Calculation steps:
[( 586 - 830 ) ÷ 830] x 100 = -29.4%
Formula
Percentage change = [(586 - 830) / 830] x 100
Subtract the new number by the original number
586 - 830 = -244
-244 ÷ 830 = -0.29397590361445786
-0.29397590361445786 x 100 = -29.4%