Solutions by everydaycalculation.com
1st number: 3 9/12, 2nd number: 1 9/12
4512 - 2112 is 21.
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Related: 90/12-21/12 45/12-42/12 45/24-21/12 45/12-21/24 45/12-63/12 45/36-21/12 45/12-21/36 45/60-21/12 45/12-21/60 45/84-21/12 45/12-21/84
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