-54.75% is the change from 400 to 181
Calculation steps:
[( 181 - 400 ) ÷ 400] x 100 = -54.75%
Formula
Percentage change = [(181 - 400) / 400] x 100
Subtract the new number by the original number
181 - 400 = -219
-219 ÷ 400 = -0.5475
-0.5475 x 100 = -54.75%