-48.55% is the change from 620 to 319
Calculation steps:
[( 319 - 620 ) ÷ 620] x 100 = -48.55%
Formula
Percentage change = [(319 - 620) / 620] x 100
Subtract the new number by the original number
319 - 620 = -301
-301 ÷ 620 = -0.4854838709677419
-0.4854838709677419 x 100 = -48.55%