-84.64% is the change from 586 to 90
Calculation steps:
[( 90 - 586 ) ÷ 586] x 100 = -84.64%
Formula
Percentage change = [(90 - 586) / 586] x 100
Subtract the new number by the original number
90 - 586 = -496
-496 ÷ 586 = -0.8464163822525598
-0.8464163822525598 x 100 = -84.64%