-55.12% is the change from 869 to 390
Calculation steps:
[( 390 - 869 ) ÷ 869] x 100 = -55.12%
Formula
Percentage change = [(390 - 869) / 869] x 100
Subtract the new number by the original number
390 - 869 = -479
-479 ÷ 869 = -0.5512082853855006
-0.5512082853855006 x 100 = -55.12%