-86.7% is the change from 669 to 89
Calculation steps:
[( 89 - 669 ) ÷ 669] x 100 = -86.7%
Formula
Percentage change = [(89 - 669) / 669] x 100
Subtract the new number by the original number
89 - 669 = -580
-580 ÷ 669 = -0.866965620328849
-0.866965620328849 x 100 = -86.7%