-36.61% is the change from 866 to 549
Calculation steps:
[( 549 - 866 ) ÷ 866] x 100 = -36.61%
Formula
Percentage change = [(549 - 866) / 866] x 100
Subtract the new number by the original number
549 - 866 = -317
-317 ÷ 866 = -0.36605080831408776
-0.36605080831408776 x 100 = -36.61%