-59.7% is the change from 866 to 349
Calculation steps:
[( 349 - 866 ) ÷ 866] x 100 = -59.7%
Formula
Percentage change = [(349 - 866) / 866] x 100
Subtract the new number by the original number
349 - 866 = -517
-517 ÷ 866 = -0.5969976905311778
-0.5969976905311778 x 100 = -59.7%