Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 2 4/7
13 - 187 is -4721.
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Related: 2/3-18/7 1/3-36/7 1/6-18/7 1/3-18/14 1/3-54/7 1/9-18/7 1/3-18/21 5/3-18/7 1/3-90/7 1/15-18/7 1/3-18/35 7/3-18/7 1/21-18/7 1/3-18/49
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