Solutions by everydaycalculation.com
1st number: 14/20, 2nd number: 1 5/10
1420 - 1510 is -45.
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Related: 28/20-15/10 14/20-30/10 14/40-15/10 14/20-15/20 42/20-15/10 14/20-45/10 14/60-15/10 14/20-15/30 70/20-15/10 14/20-75/10 14/20-15/50 98/20-15/10 14/20-15/70
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