-60.82% is the change from 638 to 250
Calculation steps:
[( 250 - 638 ) ÷ 638] x 100 = -60.82%
Formula
Percentage change = [(250 - 638) / 638] x 100
Subtract the new number by the original number
250 - 638 = -388
-388 ÷ 638 = -0.6081504702194357
-0.6081504702194357 x 100 = -60.82%