-56.46% is the change from 666 to 290
Calculation steps:
[( 290 - 666 ) ÷ 666] x 100 = -56.46%
Formula
Percentage change = [(290 - 666) / 666] x 100
Subtract the new number by the original number
290 - 666 = -376
-376 ÷ 666 = -0.5645645645645646
-0.5645645645645646 x 100 = -56.46%