-28.92% is the change from 830 to 590
Calculation steps:
[( 590 - 830 ) ÷ 830] x 100 = -28.92%
Formula
Percentage change = [(590 - 830) / 830] x 100
Subtract the new number by the original number
590 - 830 = -240
-240 ÷ 830 = -0.2891566265060241
-0.2891566265060241 x 100 = -28.92%