-10.83% is the change from 480 to 428
Calculation steps:
[( 428 - 480 ) ÷ 480] x 100 = -10.83%
Formula
Percentage change = [(428 - 480) / 480] x 100
Subtract the new number by the original number
428 - 480 = -52
-52 ÷ 480 = -0.10833333333333334
-0.10833333333333334 x 100 = -10.83%