4/9 > 5/12
16/36 > 15/36
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5/25 = 1/5 = 4/20 12/48 = 1/4 = 5/20 12/48 is greater.
4 is less than 5.
It is: 12-5 = 7
-4
56. Tens digit is greater than 4 and less than 6 so it can only be 5, so the number is 5X. It is one less than the number whose digits sum to 12, so its digits sum to 12-1 = 11 → 5 + X = 11 → X = 11 - 5 = 6 → the number is 56.