Solutions by everydaycalculation.com
1st number: 1 1/20, 2nd number: 1 1/7
2120 - 87 is -13140.
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Related: 42/20-8/7 21/20-16/7 21/40-8/7 21/20-8/14 63/20-8/7 21/20-24/7 21/60-8/7 21/20-8/21 21/20-40/7 21/20-8/35 21/20-56/7 21/20-8/49
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