A Student Receives $1000 at the Start of Each Month $\frac { a } { b }$

Short Answer

A student receives $1000 at the start of each month from his parents. Every month the student spends 70% of all the money he has. If the only money the student receives is the money from his parents, estimate how much money the student will have at the beginning of each month after an extended period of time.
Enter just a reduced fraction of form $\frac { a } { b }$ .