-33.8% is the change from 642 to 425
Calculation steps:
[( 425 - 642 ) ÷ 642] x 100 = -33.8%
Formula
Percentage change = [(425 - 642) / 642] x 100
Subtract the new number by the original number
425 - 642 = -217
-217 ÷ 642 = -0.338006230529595
-0.338006230529595 x 100 = -33.8%