-56.74% is the change from 638 to 276
Calculation steps:
[( 276 - 638 ) ÷ 638] x 100 = -56.74%
Formula
Percentage change = [(276 - 638) / 638] x 100
Subtract the new number by the original number
276 - 638 = -362
-362 ÷ 638 = -0.567398119122257
-0.567398119122257 x 100 = -56.74%