-32.76% is the change from 638 to 429
Calculation steps:
[( 429 - 638 ) ÷ 638] x 100 = -32.76%
Formula
Percentage change = [(429 - 638) / 638] x 100
Subtract the new number by the original number
429 - 638 = -209
-209 ÷ 638 = -0.3275862068965517
-0.3275862068965517 x 100 = -32.76%