-27.57% is the change from 642 to 465
Calculation steps:
[( 465 - 642 ) ÷ 642] x 100 = -27.57%
Formula
Percentage change = [(465 - 642) / 642] x 100
Subtract the new number by the original number
465 - 642 = -177
-177 ÷ 642 = -0.2757009345794392
-0.2757009345794392 x 100 = -27.57%