-93.17% is the change from 586 to 40
Calculation steps:
[( 40 - 586 ) ÷ 586] x 100 = -93.17%
Formula
Percentage change = [(40 - 586) / 586] x 100
Subtract the new number by the original number
40 - 586 = -546
-546 ÷ 586 = -0.931740614334471
-0.931740614334471 x 100 = -93.17%