-92.38% is the change from 866 to 66
Calculation steps:
[( 66 - 866 ) ÷ 866] x 100 = -92.38%
Formula
Percentage change = [(66 - 866) / 866] x 100
Subtract the new number by the original number
66 - 866 = -800
-800 ÷ 866 = -0.9237875288683602
-0.9237875288683602 x 100 = -92.38%