Question

Find the compound ratios of the following

5:7 and 2:9​

Answer 1

Answer:

10:14:63

Just multiple 5:7 with 2 & 2:9 with 7 to get the middle ratio same, that's it...but remember when you multiply 1 number of the ratio, you will have to multiply the other no. also.

Answer 2

GIVEN=4:5and2:9

To find = The compound ratio?

Solution:

Compound ratio for the ratio x:y and a:b is defined as the multiple of a and x ratio multiple of y and b I.e... x×a:y×b.

Applying in the given ratio,x=4,y=5,a=2,b=9

x×a:y×b

4×2:5×9

8:45

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