-71.67% is the change from 586 to 166
Calculation steps:
[( 166 - 586 ) ÷ 586] x 100 = -71.67%
Formula
Percentage change = [(166 - 586) / 586] x 100
Subtract the new number by the original number
166 - 586 = -420
-420 ÷ 586 = -0.7167235494880546
-0.7167235494880546 x 100 = -71.67%