-55.81% is the change from 921 to 407
Calculation steps:
[( 407 - 921 ) ÷ 921] x 100 = -55.81%
Formula
Percentage change = [(407 - 921) / 921] x 100
Subtract the new number by the original number
407 - 921 = -514
-514 ÷ 921 = -0.5580890336590663
-0.5580890336590663 x 100 = -55.81%