-64.58% is the change from 864 to 306
Calculation steps:
[( 306 - 864 ) ÷ 864] x 100 = -64.58%
Formula
Percentage change = [(306 - 864) / 864] x 100
Subtract the new number by the original number
306 - 864 = -558
-558 ÷ 864 = -0.6458333333333334
-0.6458333333333334 x 100 = -64.58%