-57.76% is the change from 921 to 389
Calculation steps:
[( 389 - 921 ) ÷ 921] x 100 = -57.76%
Formula
Percentage change = [(389 - 921) / 921] x 100
Subtract the new number by the original number
389 - 921 = -532
-532 ÷ 921 = -0.5776330076004343
-0.5776330076004343 x 100 = -57.76%