-33.49% is the change from 639 to 425
Calculation steps:
[( 425 - 639 ) ÷ 639] x 100 = -33.49%
Formula
Percentage change = [(425 - 639) / 639] x 100
Subtract the new number by the original number
425 - 639 = -214
-214 ÷ 639 = -0.3348982785602504
-0.3348982785602504 x 100 = -33.49%