Solutions by everydaycalculation.com
1st number: 3 6/12, 2nd number: 4 6/12
4212 - 5412 is -11.
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Related: 84/12-54/12 42/24-54/12 42/12-54/24 42/36-54/12 42/12-54/36 42/60-54/12 42/12-54/60 42/84-54/12 42/12-54/84
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