-99.68% is the change from 633 to 2
Calculation steps:
[( 2 - 633 ) ÷ 633] x 100 = -99.68%
Formula
Percentage change = [(2 - 633) / 633] x 100
Subtract the new number by the original number
2 - 633 = -631
-631 ÷ 633 = -0.9968404423380727
-0.9968404423380727 x 100 = -99.68%