-22.65% is the change from 861 to 666
Calculation steps:
[( 666 - 861 ) ÷ 861] x 100 = -22.65%
Formula
Percentage change = [(666 - 861) / 861] x 100
Subtract the new number by the original number
666 - 861 = -195
-195 ÷ 861 = -0.2264808362369338
-0.2264808362369338 x 100 = -22.65%