Solutions by everydaycalculation.com
1st number: 15/30, 2nd number: 1 20/30
1530 - 5030 is -76.
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Related: 15/60-50/30 15/30-50/60 45/30-50/30 15/90-50/30 15/30-50/90 75/30-50/30
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