-35.52% is the change from 639 to 412
Calculation steps:
[( 412 - 639 ) ÷ 639] x 100 = -35.52%
Formula
Percentage change = [(412 - 639) / 639] x 100
Subtract the new number by the original number
412 - 639 = -227
-227 ÷ 639 = -0.35524256651017216
-0.35524256651017216 x 100 = -35.52%