Question 4 - Answer

Step 1 :            Food : Transport = 5 : 3


                        5 – 3 = 2 Units ( more food than transport)

                        2 Units =580 1 Unit = 290

Step 2 :            290 x 5 = 1450 (Food) 290 x 3 = 870 (Transport)

                       1450 + 870 = 2320 ( John spent)

Step 3 :           Give : Spent = 7 : 4

                       4 Units = 2320 1 Unit = 580

Step 4 :           Total Salary = 7 + 4 = 11 Units

                      11 x 580 = 6380

Step 5 :          Food : Salary = 1450 : 6380 = 5 : 22

The ratio of the amount of money spent on food to his salary was 5 : 22.