-28.04% is the change from 642 to 462
Calculation steps:
[( 462 - 642 ) ÷ 642] x 100 = -28.04%
Formula
Percentage change = [(462 - 642) / 642] x 100
Subtract the new number by the original number
462 - 642 = -180
-180 ÷ 642 = -0.2803738317757009
-0.2803738317757009 x 100 = -28.04%