Answer: 1/5
Explanation: Since, according to the given figure,
Jake spends money for 60 lunch special= 12 unit
Therefore, In this case, money per lunch= 12/60=1/5
Jake spends money for 45 lunch special=9 unit
Therefore, In this case, money per lunch= 9/45=1/5
Jake spends money for 30 lunch special=6 unit
Therefore, In this case, money per lunch= 9/45=1/5
Again, Jake spends money for 15 lunch special=3 unit
Therefore, In this case, money per lunch= 3/15=1/5
Thus, from the above explanation it is clear that the money per lunch is same for every condition and is equal to 1/5.
