-44.08% is the change from 921 to 515
Calculation steps:
[( 515 - 921 ) ÷ 921] x 100 = -44.08%
Formula
Percentage change = [(515 - 921) / 921] x 100
Subtract the new number by the original number
515 - 921 = -406
-406 ÷ 921 = -0.44082519001085774
-0.44082519001085774 x 100 = -44.08%