-50.75% is the change from 400 to 197
Calculation steps:
[( 197 - 400 ) ÷ 400] x 100 = -50.75%
Formula
Percentage change = [(197 - 400) / 400] x 100
Subtract the new number by the original number
197 - 400 = -203
-203 ÷ 400 = -0.5075
-0.5075 x 100 = -50.75%