-51.85% is the change from 866 to 417
Calculation steps:
[( 417 - 866 ) ÷ 866] x 100 = -51.85%
Formula
Percentage change = [(417 - 866) / 866] x 100
Subtract the new number by the original number
417 - 866 = -449
-449 ÷ 866 = -0.5184757505773672
-0.5184757505773672 x 100 = -51.85%