Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 1 1/15
13 - 1615 is -1115.
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Related: 2/3-16/15 1/3-32/15 1/6-16/15 1/3-16/30 1/3-48/15 1/9-16/15 1/3-16/45 5/3-16/15 1/3-80/15 1/15-16/15 1/3-16/75 7/3-16/15 1/21-16/15
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