How to set different percentages for Mobile & Tablets

I am currently using android.support.percent API

My sample code

<android.support.percent.PercentRelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"/>
 <TextView
     android:text="Completed"
     app:layout_widthPercent="40%"
     app:layout_heightPercent="40%"
     app:layout_marginTopPercent="15%"
     app:layout_marginLeftPercent="15%"/>
</android.support.percent.PercentRelativeLayout/>

My problem:

Percent relative layout fit correctly in Tablets... But some views are display very small in mobile phone.

So I want to increase the percentage for phone only.. not tablets.

My question:

How to set different percentage for phones & tablet using percent relative layout.(like different dimensions)

app:layout_heightPercent="40%" // fit for tablet But I want to increase to 50% for phone..

you can use smallest width dimens

<android.support.percent.PercentRelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"/>
 <TextView
     android:text="Completed"
     app:layout_widthPercent="@fraction/width"
     app:layout_heightPercent="@fraction/height"
     app:layout_marginTopPercent="@fraction/margin_top"
     app:layout_marginLeftPercent="@fraction/margin_left"/>
</android.support.percent.PercentRelativeLayout/>

and in dimens:

dimens.xml

<fraction name="width">40%</fraction>
    <fraction name="height">40%</fraction>
    <fraction name="margin_top">15%</fraction>
    <fraction name="margin_left">15%</fraction>

and dimens.xml (sw 600dp)

<fraction name="width">40%</fraction>
    <fraction name="height">50%</fraction>
    <fraction name="margin_top">15%</fraction>
    <fraction name="margin_left">15%</fraction>

you can see more detail for design screen here