-99.85% is the change from 664 to 1
Calculation steps:
[( 1 - 664 ) ÷ 664] x 100 = -99.85%
Formula
Percentage change = [(1 - 664) / 664] x 100
Subtract the new number by the original number
1 - 664 = -663
-663 ÷ 664 = -0.9984939759036144
-0.9984939759036144 x 100 = -99.85%