-89.72% is the change from 778 to 80
Calculation steps:
[( 80 - 778 ) ÷ 778] x 100 = -89.72%
Formula
Percentage change = [(80 - 778) / 778] x 100
Subtract the new number by the original number
80 - 778 = -698
-698 ÷ 778 = -0.897172236503856
-0.897172236503856 x 100 = -89.72%