-86.06% is the change from 660 to 92
Calculation steps:
[( 92 - 660 ) ÷ 660] x 100 = -86.06%
Formula
Percentage change = [(92 - 660) / 660] x 100
Subtract the new number by the original number
92 - 660 = -568
-568 ÷ 660 = -0.8606060606060606
-0.8606060606060606 x 100 = -86.06%