-43.54% is the change from 921 to 520
Calculation steps:
[( 520 - 921 ) ÷ 921] x 100 = -43.54%
Formula
Percentage change = [(520 - 921) / 921] x 100
Subtract the new number by the original number
520 - 921 = -401
-401 ÷ 921 = -0.43539630836047777
-0.43539630836047777 x 100 = -43.54%