-64.46% is the change from 861 to 306
Calculation steps:
[( 306 - 861 ) ÷ 861] x 100 = -64.46%
Formula
Percentage change = [(306 - 861) / 861] x 100
Subtract the new number by the original number
306 - 861 = -555
-555 ÷ 861 = -0.6445993031358885
-0.6445993031358885 x 100 = -64.46%