-31.91% is the change from 586 to 399
Calculation steps:
[( 399 - 586 ) ÷ 586] x 100 = -31.91%
Formula
Percentage change = [(399 - 586) / 586] x 100
Subtract the new number by the original number
399 - 586 = -187
-187 ÷ 586 = -0.3191126279863481
-0.3191126279863481 x 100 = -31.91%