-11.58% is the change from 475 to 420
Calculation steps:
[( 420 - 475 ) ÷ 475] x 100 = -11.58%
Formula
Percentage change = [(420 - 475) / 475] x 100
Subtract the new number by the original number
420 - 475 = -55
-55 ÷ 475 = -0.11578947368421053
-0.11578947368421053 x 100 = -11.58%