Solutions by everydaycalculation.com
1st number: 1 5/10, 2nd number: 2 9/20
1510 - 4920 is -1920.
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Related: 30/10-49/20 15/10-98/20 15/20-49/20 15/10-49/40 45/10-49/20 15/30-49/20 15/10-49/60 75/10-49/20 15/50-49/20 15/70-49/20
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