-52.35% is the change from 638 to 304
Calculation steps:
[( 304 - 638 ) ÷ 638] x 100 = -52.35%
Formula
Percentage change = [(304 - 638) / 638] x 100
Subtract the new number by the original number
304 - 638 = -334
-334 ÷ 638 = -0.5235109717868338
-0.5235109717868338 x 100 = -52.35%