-64.9% is the change from 866 to 304
Calculation steps:
[( 304 - 866 ) ÷ 866] x 100 = -64.9%
Formula
Percentage change = [(304 - 866) / 866] x 100
Subtract the new number by the original number
304 - 866 = -562
-562 ÷ 866 = -0.648960739030023
-0.648960739030023 x 100 = -64.9%