**Question:**

What must be subtracted in 7:9 so to make it 3:4???

1

7:9=16, 3:4=7; 16-7=9 so 7-3=4,9-4=5 so final answer is 4:5

4:__5__

__1__

(7/9) - X= (3/4).

X = (7/9) - (3/4) .

= (28-27)/36.

= 1/36.

1:36

It is 1/36. 7:9 is a ratio so it can be any fraction 7/9,14/18,21/27 ...etc .

Answer is 1.

If I get the meaning of the question correctly then

7-x/9-x=3/4

X=1

Ya i m also sure the ans. Is 1/36