-42.41% is the change from 639 to 368
Calculation steps:
[( 368 - 639 ) ÷ 639] x 100 = -42.41%
Formula
Percentage change = [(368 - 639) / 639] x 100
Subtract the new number by the original number
368 - 639 = -271
-271 ÷ 639 = -0.4241001564945227
-0.4241001564945227 x 100 = -42.41%