-51.62% is the change from 866 to 419
Calculation steps:
[( 419 - 866 ) ÷ 866] x 100 = -51.62%
Formula
Percentage change = [(419 - 866) / 866] x 100
Subtract the new number by the original number
419 - 866 = -447
-447 ÷ 866 = -0.5161662817551963
-0.5161662817551963 x 100 = -51.62%