-30.67% is the change from 639 to 443
Calculation steps:
[( 443 - 639 ) ÷ 639] x 100 = -30.67%
Formula
Percentage change = [(443 - 639) / 639] x 100
Subtract the new number by the original number
443 - 639 = -196
-196 ÷ 639 = -0.30672926447574334
-0.30672926447574334 x 100 = -30.67%