-92.19% is the change from 845 to 66
Calculation steps:
[( 66 - 845 ) ÷ 845] x 100 = -92.19%
Formula
Percentage change = [(66 - 845) / 845] x 100
Subtract the new number by the original number
66 - 845 = -779
-779 ÷ 845 = -0.9218934911242603
-0.9218934911242603 x 100 = -92.19%