-56.35% is the change from 921 to 402
Calculation steps:
[( 402 - 921 ) ÷ 921] x 100 = -56.35%
Formula
Percentage change = [(402 - 921) / 921] x 100
Subtract the new number by the original number
402 - 921 = -519
-519 ÷ 921 = -0.5635179153094463
-0.5635179153094463 x 100 = -56.35%