At first, John had as much money as Paul

MATHEMATICS · Subjective · AoPS · Mathematics · One-Variable Linear Equations · One-Variable Linear Equations

Problem

At first, John had

\frac{2}{3}

as much money as Paul. After John saved another

84 and Paul spent

25, John had

\frac{4}{5}

as much money as Paul. Find the amount of money John had at first.