-39.4% is the change from 637 to 386
Calculation steps:
[( 386 - 637 ) ÷ 637] x 100 = -39.4%
Formula
Percentage change = [(386 - 637) / 637] x 100
Subtract the new number by the original number
386 - 637 = -251
-251 ÷ 637 = -0.3940345368916798
-0.3940345368916798 x 100 = -39.4%