-34.9% is the change from 639 to 416
Calculation steps:
[( 416 - 639 ) ÷ 639] x 100 = -34.9%
Formula
Percentage change = [(416 - 639) / 639] x 100
Subtract the new number by the original number
416 - 639 = -223
-223 ÷ 639 = -0.3489827856025039
-0.3489827856025039 x 100 = -34.9%