Solutions by everydaycalculation.com
1st number: 10/30, 2nd number: 2 10/30
1030 - 7030 is -21.
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Related: 20/30-70/30 10/60-70/30 10/30-70/60 10/90-70/30 10/30-70/90 50/30-70/30 70/30-70/30
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