-32.25% is the change from 921 to 624
Calculation steps:
[( 624 - 921 ) ÷ 921] x 100 = -32.25%
Formula
Percentage change = [(624 - 921) / 921] x 100
Subtract the new number by the original number
624 - 921 = -297
-297 ÷ 921 = -0.32247557003257327
-0.32247557003257327 x 100 = -32.25%