-99.1% is the change from 995 to 9
Calculation steps:
[( 9 - 995 ) ÷ 995] x 100 = -99.1%
Formula
Percentage change = [(9 - 995) / 995] x 100
Subtract the new number by the original number
9 - 995 = -986
-986 ÷ 995 = -0.9909547738693467
-0.9909547738693467 x 100 = -99.1%