-33.88% is the change from 921 to 609
Calculation steps:
[( 609 - 921 ) ÷ 921] x 100 = -33.88%
Formula
Percentage change = [(609 - 921) / 921] x 100
Subtract the new number by the original number
609 - 921 = -312
-312 ÷ 921 = -0.33876221498371334
-0.33876221498371334 x 100 = -33.88%