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LCD of 9 and 5 = 45 so equivalent fractions are 25/45 and 36/45. The latter is clearly the larger ie four fifths
The LCD for 2/9 and 1/6 is 18.
The LCD of 3/4 and 7/9 is 36.
what you need to do is find the LCD (Least Common Denominator) of 9 and 12. there are a few ways to do this but you can google those. LCD of 9 and 12 is 36 because 9 x 4 = 12 x 3 4/9 x 4 = 16/36 and 1/12 x 3 = 3/36 16/36 - 3/36 = 13/36
LCD(8, 6) = 24