-99.9% is the change from 961 to 1
Calculation steps:
[( 1 - 961 ) ÷ 961] x 100 = -99.9%
Formula
Percentage change = [(1 - 961) / 961] x 100
Subtract the new number by the original number
1 - 961 = -960
-960 ÷ 961 = -0.9989594172736732
-0.9989594172736732 x 100 = -99.9%