-48.32% is the change from 985 to 509
Calculation steps:
[( 509 - 985 ) ÷ 985] x 100 = -48.32%
Formula
Percentage change = [(509 - 985) / 985] x 100
Subtract the new number by the original number
509 - 985 = -476
-476 ÷ 985 = -0.483248730964467
-0.483248730964467 x 100 = -48.32%