-93.1% is the change from 609 to 42
Calculation steps:
[( 42 - 609 ) ÷ 609] x 100 = -93.1%
Formula
Percentage change = [(42 - 609) / 609] x 100
Subtract the new number by the original number
42 - 609 = -567
-567 ÷ 609 = -0.9310344827586207
-0.9310344827586207 x 100 = -93.1%