-48.8% is the change from 623 to 319
Calculation steps:
[( 319 - 623 ) ÷ 623] x 100 = -48.8%
Formula
Percentage change = [(319 - 623) / 623] x 100
Subtract the new number by the original number
319 - 623 = -304
-304 ÷ 623 = -0.48796147672552165
-0.48796147672552165 x 100 = -48.8%