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4/9 / 1/3 = 4/9 X 3/1 = 12/9 or 1 and 1/3
1/2. Divide both by 3, you get 3 over 6. Divide by 3 again, get 1 over 2. Or just divide both by 9. Also, you can look at it and see that half of 18 is 9, so it is one-half.
11/15
Divide by 3/3 9/12 = 3/4
divide both sides by 3 9/48 = 3/16