-51.2% is the change from 623 to 304
Calculation steps:
[( 304 - 623 ) ÷ 623] x 100 = -51.2%
Formula
Percentage change = [(304 - 623) / 623] x 100
Subtract the new number by the original number
304 - 623 = -319
-319 ÷ 623 = -0.5120385232744783
-0.5120385232744783 x 100 = -51.2%