-57% is the change from 921 to 396
Calculation steps:
[( 396 - 921 ) ÷ 921] x 100 = -57%
Formula
Percentage change = [(396 - 921) / 921] x 100
Subtract the new number by the original number
396 - 921 = -525
-525 ÷ 921 = -0.5700325732899023
-0.5700325732899023 x 100 = -57%