42/9 is much greater. 42/9 is the same as 4 and 7/9 (since 9 goes into 42 4 times with 7 left over). Since 5/9 is less than 1, clearly 42/9 is much greater.
7/9 alone would still be greater than 5/9. But since it's not just 7/9, but 4 and 7/9, it is obviously greater than 5/9.
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