-85.39% is the change from 609 to 89
Calculation steps:
[( 89 - 609 ) ÷ 609] x 100 = -85.39%
Formula
Percentage change = [(89 - 609) / 609] x 100
Subtract the new number by the original number
89 - 609 = -520
-520 ÷ 609 = -0.8538587848932676
-0.8538587848932676 x 100 = -85.39%