-97.25% is the change from 400 to 11
Calculation steps:
[( 11 - 400 ) ÷ 400] x 100 = -97.25%
Formula
Percentage change = [(11 - 400) / 400] x 100
Subtract the new number by the original number
11 - 400 = -389
-389 ÷ 400 = -0.9725
-0.9725 x 100 = -97.25%