-7.91% is the change from 847 to 780
Calculation steps:
[( 780 - 847 ) ÷ 847] x 100 = -7.91%
Formula
Percentage change = [(780 - 847) / 847] x 100
Subtract the new number by the original number
780 - 847 = -67
-67 ÷ 847 = -0.07910271546635184
-0.07910271546635184 x 100 = -7.91%