-46.15% is the change from 780 to 420
Calculation steps:
[( 420 - 780 ) ÷ 780] x 100 = -46.15%
Formula
Percentage change = [(420 - 780) / 780] x 100
Subtract the new number by the original number
420 - 780 = -360
-360 ÷ 780 = -0.46153846153846156
-0.46153846153846156 x 100 = -46.15%