-55.58% is the change from 878 to 390
Calculation steps:
[( 390 - 878 ) ÷ 878] x 100 = -55.58%
Formula
Percentage change = [(390 - 878) / 878] x 100
Subtract the new number by the original number
390 - 878 = -488
-488 ÷ 878 = -0.5558086560364465
-0.5558086560364465 x 100 = -55.58%