-99.84% is the change from 634 to 1
Calculation steps:
[( 1 - 634 ) ÷ 634] x 100 = -99.84%
Formula
Percentage change = [(1 - 634) / 634] x 100
Subtract the new number by the original number
1 - 634 = -633
-633 ÷ 634 = -0.998422712933754
-0.998422712933754 x 100 = -99.84%