-12.3% is the change from 488 to 428
Calculation steps:
[( 428 - 488 ) ÷ 488] x 100 = -12.3%
Formula
Percentage change = [(428 - 488) / 488] x 100
Subtract the new number by the original number
428 - 488 = -60
-60 ÷ 488 = -0.12295081967213115
-0.12295081967213115 x 100 = -12.3%