-35.68% is the change from 639 to 411
Calculation steps:
[( 411 - 639 ) ÷ 639] x 100 = -35.68%
Formula
Percentage change = [(411 - 639) / 639] x 100
Subtract the new number by the original number
411 - 639 = -228
-228 ÷ 639 = -0.3568075117370892
-0.3568075117370892 x 100 = -35.68%