-99.5% is the change from 995 to 5
Calculation steps:
[( 5 - 995 ) ÷ 995] x 100 = -99.5%
Formula
Percentage change = [(5 - 995) / 995] x 100
Subtract the new number by the original number
5 - 995 = -990
-990 ÷ 995 = -0.9949748743718593
-0.9949748743718593 x 100 = -99.5%