-49.94% is the change from 781 to 391
Calculation steps:
[( 391 - 781 ) ÷ 781] x 100 = -49.94%
Formula
Percentage change = [(391 - 781) / 781] x 100
Subtract the new number by the original number
391 - 781 = -390
-390 ÷ 781 = -0.499359795134443
-0.499359795134443 x 100 = -49.94%