Solutions by everydaycalculation.com
1st number: 24/30, 2nd number: 1 6/30
2430 - 3630 is -25.
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Related: 48/30-36/30 24/30-72/30 24/60-36/30 24/30-36/60 72/30-36/30 24/90-36/30 24/30-36/90
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