-99.85% is the change from 651 to 1
Calculation steps:
[( 1 - 651 ) ÷ 651] x 100 = -99.85%
Formula
Percentage change = [(1 - 651) / 651] x 100
Subtract the new number by the original number
1 - 651 = -650
-650 ÷ 651 = -0.9984639016897081
-0.9984639016897081 x 100 = -99.85%