-52.44% is the change from 921 to 438
Calculation steps:
[( 438 - 921 ) ÷ 921] x 100 = -52.44%
Formula
Percentage change = [(438 - 921) / 921] x 100
Subtract the new number by the original number
438 - 921 = -483
-483 ÷ 921 = -0.5244299674267101
-0.5244299674267101 x 100 = -52.44%