Solutions by everydaycalculation.com
1st number: 20/30, 2nd number: 1 6/30
2030 - 3630 is -815.
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Related: 40/30-36/30 20/30-72/30 20/60-36/30 20/30-36/60 60/30-36/30 20/90-36/30 20/30-36/90
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