-56.76% is the change from 666 to 288
Calculation steps:
[( 288 - 666 ) ÷ 666] x 100 = -56.76%
Formula
Percentage change = [(288 - 666) / 666] x 100
Subtract the new number by the original number
288 - 666 = -378
-378 ÷ 666 = -0.5675675675675675
-0.5675675675675675 x 100 = -56.76%