Solutions by everydaycalculation.com
1st number: 18 0/3, 2nd number: 1/9
543 - 19 is 1619.
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Related: 54/3-2/9 54/6-1/9 54/3-1/18 54/3-3/9 54/9-1/9 54/3-1/27 54/3-5/9 54/15-1/9 54/3-1/45 54/3-7/9 54/21-1/9 54/3-1/63
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