-44.6% is the change from 639 to 354
Calculation steps:
[( 354 - 639 ) ÷ 639] x 100 = -44.6%
Formula
Percentage change = [(354 - 639) / 639] x 100
Subtract the new number by the original number
354 - 639 = -285
-285 ÷ 639 = -0.4460093896713615
-0.4460093896713615 x 100 = -44.6%