-64.54% is the change from 863 to 306
Calculation steps:
[( 306 - 863 ) ÷ 863] x 100 = -64.54%
Formula
Percentage change = [(306 - 863) / 863] x 100
Subtract the new number by the original number
306 - 863 = -557
-557 ÷ 863 = -0.645422943221321
-0.645422943221321 x 100 = -64.54%