-64.52% is the change from 186 to 66
Calculation steps:
[( 66 - 186 ) ÷ 186] x 100 = -64.52%
Formula
Percentage change = [(66 - 186) / 186] x 100
Subtract the new number by the original number
66 - 186 = -120
-120 ÷ 186 = -0.6451612903225806
-0.6451612903225806 x 100 = -64.52%