Solutions by everydaycalculation.com
1st number: 1 6/12, 2nd number: 3 9/12
1812 - 4512 is -94.
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Related: 36/12-45/12 18/12-90/12 18/24-45/12 18/12-45/24 54/12-45/12 18/36-45/12 18/12-45/36 90/12-45/12 18/60-45/12 18/12-45/60 18/84-45/12 18/12-45/84
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