-55.6% is the change from 901 to 400
Calculation steps:
[( 400 - 901 ) ÷ 901] x 100 = -55.6%
Formula
Percentage change = [(400 - 901) / 901] x 100
Subtract the new number by the original number
400 - 901 = -501
-501 ÷ 901 = -0.5560488346281909
-0.5560488346281909 x 100 = -55.6%