Question

If x : y = 7:9 and y:z= 15 :7 .
find x :z

Answer 1

Answer:

5:3

Step-by-step explanation:

On Multiplying both the ratios

(x:y)*(y:z) y gets cancelled out

And value of x:z is obtained that is 5:3

Answer 2

It is easier to solve with ratios.

7:9 can be rewritten. 15:7 can be rewritten too.

Find LCM of 9 and 15. The LCM is 45.

Now, 7:9=35:45

And, 15:7=45:21

Now we have x:y:z=35:45:21

Therefore x:z=35:21=5:3