-48.5% is the change from 602 to 310
Calculation steps:
[( 310 - 602 ) ÷ 602] x 100 = -48.5%
Formula
Percentage change = [(310 - 602) / 602] x 100
Subtract the new number by the original number
310 - 602 = -292
-292 ÷ 602 = -0.4850498338870432
-0.4850498338870432 x 100 = -48.5%