1 way Try this Using ConstraintLayout

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:id="@+id/longTextView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxLines="1"
        android:text=" Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce vel consectetur tortor. Fusce velit velit, tincidunt vitae dolor at, pharetra condimentum nunc. Etiam ac erat ac nulla tempus ullamcorper id ac sapien."
        app:layout_constraintHorizontal_chainStyle="packed"
        app:layout_constraintHorizontal_bias="0"
        app:layout_constraintWidth_default="wrap"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@+id/shortTextView"
        />

    <TextView
        android:id="@+id/shortTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="21%"
        android:textColor="@color/colorAccent"
        app:layout_constraintBaseline_toBaselineOf="@+id/longTextView"
        app:layout_constraintLeft_toRightOf="@+id/longTextView"
        app:layout_constraintRight_toRightOf="parent" />

</android.support.constraint.ConstraintLayout>

OUTPUT using ConstraintLayout

When Long Text

When Small Text

2 way using FlexboxLayout

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.flexbox.FlexboxLayout
    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:id="@+id/textview1"
        android:layout_width="wrap_content"
        app:layout_alignSelf="flex_start"
        android:ellipsize="end"
        android:maxLines="1"
        android:layout_height="wrap_content"
        android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce vel consectetur tortor. Fusce velit velit, tincidunt vitae dolor at, pharetra condimentum nunc. Etiam ac erat ac nulla tempus ullamcorper id ac sapien."
        />

    <TextView
        android:id="@+id/textview2"
        android:text="21%"
        android:layout_width="wrap_content"
        android:minWidth="60dp"
        android:textColor="@color/colorAccent"
        app:layout_alignSelf="flex_start"
        android:layout_height="wrap_content"
        />

</com.google.android.flexbox.FlexboxLayout>

OUTPUT Using FlexboxLayout

When Long Text

When Small Text