We are given :
Borrowed money from a friend = 43.75
received a gift from dad = 50.00
Spent money on lunch = 62.50
Received allowance = 20.00
In the given amounts, we would add the money borrowed, received gift and received allowance and subtract the Spent money on lunch.
So, we get
43.75 + 50.00 + 20.00 - 62.50.
113.75 - 62.50
= 51.25.
51.25 could be convert in rational number as 5125/100 or
205/4.
So, 205/4 is rational number represents the net results of the transactions.