Solutions by everydaycalculation.com
1st number: 12/30, 2nd number: 1 2/10
1230 - 1210 is -45.
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Related: 24/30-12/10 12/30-24/10 12/60-12/10 12/30-12/20 36/30-12/10 12/30-36/10 12/90-12/10 12/30-12/30 60/30-12/10 12/30-60/10 12/30-12/50 84/30-12/10 12/30-84/10 12/30-12/70
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