-99.9% is the change from 964 to 1
Calculation steps:
[( 1 - 964 ) ÷ 964] x 100 = -99.9%
Formula
Percentage change = [(1 - 964) / 964] x 100
Subtract the new number by the original number
1 - 964 = -963
-963 ÷ 964 = -0.9989626556016598
-0.9989626556016598 x 100 = -99.9%