Solutions by everydaycalculation.com
1st number: 4 5/10, 2nd number: 4 0/10
4510 - 4010 is 12.
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Related: 90/10-40/10 45/10-80/10 45/20-40/10 45/10-40/20 45/30-40/10 45/10-40/30 45/50-40/10 45/10-40/50 45/70-40/10 45/10-40/70
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