Solutions by everydaycalculation.com
1st number: 24/30, 2nd number: 2 21/30
2430 - 8130 is -1910.
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Related: 48/30-81/30 24/60-81/30 24/30-81/60 72/30-81/30 24/90-81/30 24/30-81/90
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