-48.21% is the change from 921 to 477
Calculation steps:
[( 477 - 921 ) ÷ 921] x 100 = -48.21%
Formula
Percentage change = [(477 - 921) / 921] x 100
Subtract the new number by the original number
477 - 921 = -444
-444 ÷ 921 = -0.4820846905537459
-0.4820846905537459 x 100 = -48.21%