-13.93% is the change from 488 to 420
Calculation steps:
[( 420 - 488 ) ÷ 488] x 100 = -13.93%
Formula
Percentage change = [(420 - 488) / 488] x 100
Subtract the new number by the original number
420 - 488 = -68
-68 ÷ 488 = -0.13934426229508196
-0.13934426229508196 x 100 = -13.93%