-99.88% is the change from 843 to 1
Calculation steps:
[( 1 - 843 ) ÷ 843] x 100 = -99.88%
Formula
Percentage change = [(1 - 843) / 843] x 100
Subtract the new number by the original number
1 - 843 = -842
-842 ÷ 843 = -0.9988137603795967
-0.9988137603795967 x 100 = -99.88%