-4.02% is the change from 497 to 477
Calculation steps:
[( 477 - 497 ) ÷ 497] x 100 = -4.02%
Formula
Percentage change = [(477 - 497) / 497] x 100
Subtract the new number by the original number
477 - 497 = -20
-20 ÷ 497 = -0.04024144869215292
-0.04024144869215292 x 100 = -4.02%