Solutions by everydaycalculation.com
1st number: 27/30, 2nd number: 1 10/30
2730 - 4030 is -1330.
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Related: 54/30-40/30 27/30-80/30 27/60-40/30 27/30-40/60 81/30-40/30 27/90-40/30 27/30-40/90
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