-99.8% is the change from 1000 to 2
Calculation steps:
[( 2 - 1000 ) ÷ 1000] x 100 = -99.8%
Formula
Percentage change = [(2 - 1000) / 1000] x 100
Subtract the new number by the original number
2 - 1000 = -998
-998 ÷ 1000 = -0.998
-0.998 x 100 = -99.8%