-43.75% is the change from 400 to 225
Calculation steps:
[( 225 - 400 ) ÷ 400] x 100 = -43.75%
Formula
Percentage change = [(225 - 400) / 400] x 100
Subtract the new number by the original number
225 - 400 = -175
-175 ÷ 400 = -0.4375
-0.4375 x 100 = -43.75%