-43.32% is the change from 921 to 522
Calculation steps:
[( 522 - 921 ) ÷ 921] x 100 = -43.32%
Formula
Percentage change = [(522 - 921) / 921] x 100
Subtract the new number by the original number
522 - 921 = -399
-399 ÷ 921 = -0.43322475570032576
-0.43322475570032576 x 100 = -43.32%