-51.07% is the change from 797 to 390
Calculation steps:
[( 390 - 797 ) ÷ 797] x 100 = -51.07%
Formula
Percentage change = [(390 - 797) / 797] x 100
Subtract the new number by the original number
390 - 797 = -407
-407 ÷ 797 = -0.5106649937264742
-0.5106649937264742 x 100 = -51.07%