Solutions by everydaycalculation.com
1st number: 7/20, 2nd number: 1 4/10
720 - 1410 is -2120.
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Related: 14/20-14/10 7/20-28/10 7/40-14/10 7/20-14/20 21/20-14/10 7/20-42/10 7/60-14/10 7/20-14/30 35/20-14/10 7/20-70/10 7/20-14/50 49/20-14/10 7/20-98/10 7/20-14/70
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