-32.24% is the change from 639 to 433
Calculation steps:
[( 433 - 639 ) ÷ 639] x 100 = -32.24%
Formula
Percentage change = [(433 - 639) / 639] x 100
Subtract the new number by the original number
433 - 639 = -206
-206 ÷ 639 = -0.3223787167449139
-0.3223787167449139 x 100 = -32.24%