-53.58% is the change from 866 to 402
Calculation steps:
[( 402 - 866 ) ÷ 866] x 100 = -53.58%
Formula
Percentage change = [(402 - 866) / 866] x 100
Subtract the new number by the original number
402 - 866 = -464
-464 ÷ 866 = -0.535796766743649
-0.535796766743649 x 100 = -53.58%