-76.91% is the change from 866 to 200
Calculation steps:
[( 200 - 866 ) ÷ 866] x 100 = -76.91%
Formula
Percentage change = [(200 - 866) / 866] x 100
Subtract the new number by the original number
200 - 866 = -666
-666 ÷ 866 = -0.76905311778291
-0.76905311778291 x 100 = -76.91%