-39.2% is the change from 648 to 394
Calculation steps:
[( 394 - 648 ) ÷ 648] x 100 = -39.2%
Formula
Percentage change = [(394 - 648) / 648] x 100
Subtract the new number by the original number
394 - 648 = -254
-254 ÷ 648 = -0.39197530864197533
-0.39197530864197533 x 100 = -39.2%