-42.04% is the change from 666 to 386
Calculation steps:
[( 386 - 666 ) ÷ 666] x 100 = -42.04%
Formula
Percentage change = [(386 - 666) / 666] x 100
Subtract the new number by the original number
386 - 666 = -280
-280 ÷ 666 = -0.42042042042042044
-0.42042042042042044 x 100 = -42.04%