-55.44% is the change from 900 to 401
Calculation steps:
[( 401 - 900 ) ÷ 900] x 100 = -55.44%
Formula
Percentage change = [(401 - 900) / 900] x 100
Subtract the new number by the original number
401 - 900 = -499
-499 ÷ 900 = -0.5544444444444444
-0.5544444444444444 x 100 = -55.44%