-48.76% is the change from 603 to 309
Calculation steps:
[( 309 - 603 ) ÷ 603] x 100 = -48.76%
Formula
Percentage change = [(309 - 603) / 603] x 100
Subtract the new number by the original number
309 - 603 = -294
-294 ÷ 603 = -0.48756218905472637
-0.48756218905472637 x 100 = -48.76%