-98.15% is the change from 648 to 12
Calculation steps:
[( 12 - 648 ) ÷ 648] x 100 = -98.15%
Formula
Percentage change = [(12 - 648) / 648] x 100
Subtract the new number by the original number
12 - 648 = -636
-636 ÷ 648 = -0.9814814814814815
-0.9814814814814815 x 100 = -98.15%