-48.86% is the change from 921 to 471
Calculation steps:
[( 471 - 921 ) ÷ 921] x 100 = -48.86%
Formula
Percentage change = [(471 - 921) / 921] x 100
Subtract the new number by the original number
471 - 921 = -450
-450 ÷ 921 = -0.48859934853420195
-0.48859934853420195 x 100 = -48.86%