-18.32% is the change from 808 to 660
Calculation steps:
[( 660 - 808 ) ÷ 808] x 100 = -18.32%
Formula
Percentage change = [(660 - 808) / 808] x 100
Subtract the new number by the original number
660 - 808 = -148
-148 ÷ 808 = -0.18316831683168316
-0.18316831683168316 x 100 = -18.32%