-99.59% is the change from 966 to 4
Calculation steps:
[( 4 - 966 ) ÷ 966] x 100 = -99.59%
Formula
Percentage change = [(4 - 966) / 966] x 100
Subtract the new number by the original number
4 - 966 = -962
-962 ÷ 966 = -0.9958592132505176
-0.9958592132505176 x 100 = -99.59%