Solutions by everydaycalculation.com
115 - 415 is -15.
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Related: 2/15-4/15 1/15-8/15 1/30-4/15 1/15-4/30 3/15-4/15 1/15-12/15 1/45-4/15 1/15-4/45 5/15-4/15 1/15-20/15 1/75-4/15 1/15-4/75 7/15-4/15 1/15-28/15
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