-89.85% is the change from 778 to 79
Calculation steps:
[( 79 - 778 ) ÷ 778] x 100 = -89.85%
Formula
Percentage change = [(79 - 778) / 778] x 100
Subtract the new number by the original number
79 - 778 = -699
-699 ÷ 778 = -0.8984575835475579
-0.8984575835475579 x 100 = -89.85%