-13.58% is the change from 486 to 420
Calculation steps:
[( 420 - 486 ) ÷ 486] x 100 = -13.58%
Formula
Percentage change = [(420 - 486) / 486] x 100
Subtract the new number by the original number
420 - 486 = -66
-66 ÷ 486 = -0.13580246913580246
-0.13580246913580246 x 100 = -13.58%