-96.15% is the change from 780 to 30
Calculation steps:
[( 30 - 780 ) ÷ 780] x 100 = -96.15%
Formula
Percentage change = [(30 - 780) / 780] x 100
Subtract the new number by the original number
30 - 780 = -750
-750 ÷ 780 = -0.9615384615384616
-0.9615384615384616 x 100 = -96.15%