-31.15% is the change from 581 to 400
Calculation steps:
[( 400 - 581 ) ÷ 581] x 100 = -31.15%
Formula
Percentage change = [(400 - 581) / 581] x 100
Subtract the new number by the original number
400 - 581 = -181
-181 ÷ 581 = -0.31153184165232356
-0.31153184165232356 x 100 = -31.15%