-70.67% is the change from 566 to 166
Calculation steps:
[( 166 - 566 ) ÷ 566] x 100 = -70.67%
Formula
Percentage change = [(166 - 566) / 566] x 100
Subtract the new number by the original number
166 - 566 = -400
-400 ÷ 566 = -0.7067137809187279
-0.7067137809187279 x 100 = -70.67%