-99.9% is the change from 956 to 1
Calculation steps:
[( 1 - 956 ) ÷ 956] x 100 = -99.9%
Formula
Percentage change = [(1 - 956) / 956] x 100
Subtract the new number by the original number
1 - 956 = -955
-955 ÷ 956 = -0.9989539748953975
-0.9989539748953975 x 100 = -99.9%