-99.69% is the change from 636 to 2
Calculation steps:
[( 2 - 636 ) ÷ 636] x 100 = -99.69%
Formula
Percentage change = [(2 - 636) / 636] x 100
Subtract the new number by the original number
2 - 636 = -634
-634 ÷ 636 = -0.9968553459119497
-0.9968553459119497 x 100 = -99.69%