-53.53% is the change from 921 to 428
Calculation steps:
[( 428 - 921 ) ÷ 921] x 100 = -53.53%
Formula
Percentage change = [(428 - 921) / 921] x 100
Subtract the new number by the original number
428 - 921 = -493
-493 ÷ 921 = -0.5352877307274702
-0.5352877307274702 x 100 = -53.53%