-40.06% is the change from 639 to 383
Calculation steps:
[( 383 - 639 ) ÷ 639] x 100 = -40.06%
Formula
Percentage change = [(383 - 639) / 639] x 100
Subtract the new number by the original number
383 - 639 = -256
-256 ÷ 639 = -0.40062597809076683
-0.40062597809076683 x 100 = -40.06%