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