-80.3% is the change from 609 to 120
Calculation steps:
[( 120 - 609 ) ÷ 609] x 100 = -80.3%
Formula
Percentage change = [(120 - 609) / 609] x 100
Subtract the new number by the original number
120 - 609 = -489
-489 ÷ 609 = -0.8029556650246306
-0.8029556650246306 x 100 = -80.3%