Solutions by everydaycalculation.com
19 - 15 is -445.
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Related: 2/9-1/5 1/9-2/5 1/18-1/5 1/9-1/10 3/9-1/5 1/9-3/5 1/27-1/5 1/9-1/15 5/9-1/5 1/45-1/5 1/9-1/25 7/9-1/5 1/9-7/5 1/63-1/5 1/9-1/35
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