-96.4% is the change from 999 to 36
Calculation steps:
[( 36 - 999 ) ÷ 999] x 100 = -96.4%
Formula
Percentage change = [(36 - 999) / 999] x 100
Subtract the new number by the original number
36 - 999 = -963
-963 ÷ 999 = -0.963963963963964
-0.963963963963964 x 100 = -96.4%
Example