-33.39% is the change from 638 to 425
Calculation steps:
[( 425 - 638 ) ÷ 638] x 100 = -33.39%
Formula
Percentage change = [(425 - 638) / 638] x 100
Subtract the new number by the original number
425 - 638 = -213
-213 ÷ 638 = -0.3338557993730408
-0.3338557993730408 x 100 = -33.39%