Solutions by everydaycalculation.com
1st number: 18/30, 2nd number: 1 5/30
1830 - 3530 is -1730.
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Related: 36/30-35/30 18/30-70/30 18/60-35/30 18/30-35/60 54/30-35/30 18/90-35/30 18/30-35/90 90/30-35/30
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