-99.9% is the change from 968 to 1
Calculation steps:
[( 1 - 968 ) ÷ 968] x 100 = -99.9%
Formula
Percentage change = [(1 - 968) / 968] x 100
Subtract the new number by the original number
1 - 968 = -967
-967 ÷ 968 = -0.9989669421487604
-0.9989669421487604 x 100 = -99.9%