-56.91% is the change from 666 to 287
Calculation steps:
[( 287 - 666 ) ÷ 666] x 100 = -56.91%
Formula
Percentage change = [(287 - 666) / 666] x 100
Subtract the new number by the original number
287 - 666 = -379
-379 ÷ 666 = -0.5690690690690691
-0.5690690690690691 x 100 = -56.91%