-42.56% is the change from 921 to 529
Calculation steps:
[( 529 - 921 ) ÷ 921] x 100 = -42.56%
Formula
Percentage change = [(529 - 921) / 921] x 100
Subtract the new number by the original number
529 - 921 = -392
-392 ÷ 921 = -0.4256243213897937
-0.4256243213897937 x 100 = -42.56%