-99.69% is the change from 651 to 2
Calculation steps:
[( 2 - 651 ) ÷ 651] x 100 = -99.69%
Formula
Percentage change = [(2 - 651) / 651] x 100
Subtract the new number by the original number
2 - 651 = -649
-649 ÷ 651 = -0.9969278033794163
-0.9969278033794163 x 100 = -99.69%