-40.91% is the change from 638 to 377
Calculation steps:
[( 377 - 638 ) ÷ 638] x 100 = -40.91%
Formula
Percentage change = [(377 - 638) / 638] x 100
Subtract the new number by the original number
377 - 638 = -261
-261 ÷ 638 = -0.4090909090909091
-0.4090909090909091 x 100 = -40.91%