-85.71% is the change from 609 to 87
Calculation steps:
[( 87 - 609 ) ÷ 609] x 100 = -85.71%
Formula
Percentage change = [(87 - 609) / 609] x 100
Subtract the new number by the original number
87 - 609 = -522
-522 ÷ 609 = -0.8571428571428571
-0.8571428571428571 x 100 = -85.71%