I am performing a MLR (Multiple Linear Regression) on data set that has percentage parameters along with some numerical and categorical variables.

However while checking the MLR model assumptions, i found that i need to do an *Squared transformation* on my percentage variable. I could have blindly used the squared transformation to improve my model. But squaring a parameter with percentage values does not make any sense to me, because they might not have same implications as and when we transform a numeric variable.

Any Suggestion’s on how to proceed further is highly appreciated.