-98.23% is the change from 678 to 12
Calculation steps:
[( 12 - 678 ) ÷ 678] x 100 = -98.23%
Formula
Percentage change = [(12 - 678) / 678] x 100
Subtract the new number by the original number
12 - 678 = -666
-666 ÷ 678 = -0.9823008849557522
-0.9823008849557522 x 100 = -98.23%