Solutions by everydaycalculation.com
1st number: 4/50, 2nd number: 1 5/10
450 - 1510 is -7150.
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Related: 8/50-15/10 4/50-30/10 4/50-15/20 12/50-15/10 4/50-45/10 4/50-15/30 20/50-15/10 4/50-75/10 4/50-15/50 28/50-15/10 4/50-15/70
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