-88.6% is the change from 579 to 66
Calculation steps:
[( 66 - 579 ) ÷ 579] x 100 = -88.6%
Formula
Percentage change = [(66 - 579) / 579] x 100
Subtract the new number by the original number
66 - 579 = -513
-513 ÷ 579 = -0.8860103626943006
-0.8860103626943006 x 100 = -88.6%