-99.58% is the change from 949 to 4
Calculation steps:
[( 4 - 949 ) ÷ 949] x 100 = -99.58%
Formula
Percentage change = [(4 - 949) / 949] x 100
Subtract the new number by the original number
4 - 949 = -945
-945 ÷ 949 = -0.9957850368809273
-0.9957850368809273 x 100 = -99.58%