-89.99% is the change from 679 to 68
Calculation steps:
[( 68 - 679 ) ÷ 679] x 100 = -89.99%
Formula
Percentage change = [(68 - 679) / 679] x 100
Subtract the new number by the original number
68 - 679 = -611
-611 ÷ 679 = -0.8998527245949927
-0.8998527245949927 x 100 = -89.99%