-92.48% is the change from 878 to 66
Calculation steps:
[( 66 - 878 ) ÷ 878] x 100 = -92.48%
Formula
Percentage change = [(66 - 878) / 878] x 100
Subtract the new number by the original number
66 - 878 = -812
-812 ÷ 878 = -0.9248291571753986
-0.9248291571753986 x 100 = -92.48%