-11.95% is the change from 477 to 420
Calculation steps:
[( 420 - 477 ) ÷ 477] x 100 = -11.95%
Formula
Percentage change = [(420 - 477) / 477] x 100
Subtract the new number by the original number
420 - 477 = -57
-57 ÷ 477 = -0.11949685534591195
-0.11949685534591195 x 100 = -11.95%