-99.9% is the change from 959 to 1
Calculation steps:
[( 1 - 959 ) ÷ 959] x 100 = -99.9%
Formula
Percentage change = [(1 - 959) / 959] x 100
Subtract the new number by the original number
1 - 959 = -958
-958 ÷ 959 = -0.9989572471324296
-0.9989572471324296 x 100 = -99.9%