-82.51% is the change from 566 to 99
Calculation steps:
[( 99 - 566 ) ÷ 566] x 100 = -82.51%
Formula
Percentage change = [(99 - 566) / 566] x 100
Subtract the new number by the original number
99 - 566 = -467
-467 ÷ 566 = -0.8250883392226148
-0.8250883392226148 x 100 = -82.51%