-11.36% is the change from 880 to 780
Calculation steps:
[( 780 - 880 ) ÷ 880] x 100 = -11.36%
Formula
Percentage change = [(780 - 880) / 880] x 100
Subtract the new number by the original number
780 - 880 = -100
-100 ÷ 880 = -0.11363636363636363
-0.11363636363636363 x 100 = -11.36%