-98.09% is the change from 679 to 13
Calculation steps:
[( 13 - 679 ) ÷ 679] x 100 = -98.09%
Formula
Percentage change = [(13 - 679) / 679] x 100
Subtract the new number by the original number
13 - 679 = -666
-666 ÷ 679 = -0.9808541973490427
-0.9808541973490427 x 100 = -98.09%