-53.5% is the change from 400 to 186
Calculation steps:
[( 186 - 400 ) ÷ 400] x 100 = -53.5%
Formula
Percentage change = [(186 - 400) / 400] x 100
Subtract the new number by the original number
186 - 400 = -214
-214 ÷ 400 = -0.535
-0.535 x 100 = -53.5%