-37.25% is the change from 400 to 251
Calculation steps:
[( 251 - 400 ) ÷ 400] x 100 = -37.25%
Formula
Percentage change = [(251 - 400) / 400] x 100
Subtract the new number by the original number
251 - 400 = -149
-149 ÷ 400 = -0.3725
-0.3725 x 100 = -37.25%