Solutions by everydaycalculation.com
1st number: 4 4/9, 2nd number: 4/15
409 - 415 is 18845.
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Related: 80/9-4/15 40/9-8/15 40/18-4/15 40/9-4/30 40/9-12/15 40/27-4/15 40/9-4/45 40/9-20/15 40/45-4/15 40/9-4/75 40/9-28/15 40/63-4/15
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