-47.7% is the change from 610 to 319
Calculation steps:
[( 319 - 610 ) ÷ 610] x 100 = -47.7%
Formula
Percentage change = [(319 - 610) / 610] x 100
Subtract the new number by the original number
319 - 610 = -291
-291 ÷ 610 = -0.47704918032786886
-0.47704918032786886 x 100 = -47.7%