875% is the change from 80 to 780
Calculation steps:
[( 780 - 80 ) ÷ 80] x 100 = 875%
Formula
Percentage change = [(780 - 80) / 80] x 100
Subtract the new number by the original number
780 - 80 = 700
700 ÷ 80 = 8.75
8.75 x 100 = 875%
Example