-99.17% is the change from 845 to 7
Calculation steps:
[( 7 - 845 ) ÷ 845] x 100 = -99.17%
Formula
Percentage change = [(7 - 845) / 845] x 100
Subtract the new number by the original number
7 - 845 = -838
-838 ÷ 845 = -0.991715976331361
-0.991715976331361 x 100 = -99.17%