-38.93% is the change from 637 to 389
Calculation steps:
[( 389 - 637 ) ÷ 637] x 100 = -38.93%
Formula
Percentage change = [(389 - 637) / 637] x 100
Subtract the new number by the original number
389 - 637 = -248
-248 ÷ 637 = -0.3893249607535322
-0.3893249607535322 x 100 = -38.93%