-99.15% is the change from 825 to 7
Calculation steps:
[( 7 - 825 ) ÷ 825] x 100 = -99.15%
Formula
Percentage change = [(7 - 825) / 825] x 100
Subtract the new number by the original number
7 - 825 = -818
-818 ÷ 825 = -0.9915151515151515
-0.9915151515151515 x 100 = -99.15%