-91% is the change from 867 to 78
Calculation steps:
[( 78 - 867 ) ÷ 867] x 100 = -91%
Formula
Percentage change = [(78 - 867) / 867] x 100
Subtract the new number by the original number
78 - 867 = -789
-789 ÷ 867 = -0.9100346020761245
-0.9100346020761245 x 100 = -91%