Solutions by everydaycalculation.com
1st number: 24/30, 2nd number: 1 20/30
2430 - 5030 is -1315.
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Related: 48/30-50/30 24/60-50/30 24/30-50/60 72/30-50/30 24/90-50/30 24/30-50/90
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