The ratio of the monthly income of X and Y is 5 ∶ 4 and that of their monthly expenditures is 9 ∶ 7. If the income of Y is equal to the expenditure of X, then what is the ratio of the savings of X and Y?

The ratio of the monthly income of X and Y is 5 ∶ 4 and that of the

1.	The ratio of the monthly income of X and Y is 5 ∶ 4 and that of their monthly expenditures is 9 ∶ 7. If the income of Y is equal to the expenditure of X, then what is the ratio of the savings of X and Y?
A.	9 ∶ 8
B.	7 ∶ 6
C.	6 ∶ 7
D.	8 ∶ 9
Answer» B. 7 ∶ 6