-25.23% is the change from 642 to 480
Calculation steps:
[( 480 - 642 ) ÷ 642] x 100 = -25.23%
Formula
Percentage change = [(480 - 642) / 642] x 100
Subtract the new number by the original number
480 - 642 = -162
-162 ÷ 642 = -0.2523364485981308
-0.2523364485981308 x 100 = -25.23%