-99.16% is the change from 837 to 7
Calculation steps:
[( 7 - 837 ) ÷ 837] x 100 = -99.16%
Formula
Percentage change = [(7 - 837) / 837] x 100
Subtract the new number by the original number
7 - 837 = -830
-830 ÷ 837 = -0.991636798088411
-0.991636798088411 x 100 = -99.16%