-86.89% is the change from 679 to 89
Calculation steps:
[( 89 - 679 ) ÷ 679] x 100 = -86.89%
Formula
Percentage change = [(89 - 679) / 679] x 100
Subtract the new number by the original number
89 - 679 = -590
-590 ÷ 679 = -0.8689248895434463
-0.8689248895434463 x 100 = -86.89%