-91.02% is the change from 869 to 78
Calculation steps:
[( 78 - 869 ) ÷ 869] x 100 = -91.02%
Formula
Percentage change = [(78 - 869) / 869] x 100
Subtract the new number by the original number
78 - 869 = -791
-791 ÷ 869 = -0.9102416570771001
-0.9102416570771001 x 100 = -91.02%