-99.69% is the change from 648 to 2
Calculation steps:
[( 2 - 648 ) ÷ 648] x 100 = -99.69%
Formula
Percentage change = [(2 - 648) / 648] x 100
Subtract the new number by the original number
2 - 648 = -646
-646 ÷ 648 = -0.9969135802469136
-0.9969135802469136 x 100 = -99.69%