-64.93% is the change from 921 to 323
Calculation steps:
[( 323 - 921 ) ÷ 921] x 100 = -64.93%
Formula
Percentage change = [(323 - 921) / 921] x 100
Subtract the new number by the original number
323 - 921 = -598
-598 ÷ 921 = -0.6492942453854506
-0.6492942453854506 x 100 = -64.93%