-11.39% is the change from 878 to 778
Calculation steps:
[( 778 - 878 ) ÷ 878] x 100 = -11.39%
Formula
Percentage change = [(778 - 878) / 878] x 100
Subtract the new number by the original number
778 - 878 = -100
-100 ÷ 878 = -0.11389521640091116
-0.11389521640091116 x 100 = -11.39%