-37.35% is the change from 921 to 577
Calculation steps:
[( 577 - 921 ) ÷ 921] x 100 = -37.35%
Formula
Percentage change = [(577 - 921) / 921] x 100
Subtract the new number by the original number
577 - 921 = -344
-344 ÷ 921 = -0.3735070575461455
-0.3735070575461455 x 100 = -37.35%