-98.15% is the change from 649 to 12
Calculation steps:
[( 12 - 649 ) ÷ 649] x 100 = -98.15%
Formula
Percentage change = [(12 - 649) / 649] x 100
Subtract the new number by the original number
12 - 649 = -637
-637 ÷ 649 = -0.9815100154083205
-0.9815100154083205 x 100 = -98.15%