Solutions by everydaycalculation.com
1st number: 21/28, 2nd number: 1 1/7
2128 - 87 is -1128.
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Related: 42/28-8/7 21/28-16/7 21/56-8/7 21/28-8/14 63/28-8/7 21/28-24/7 21/84-8/7 21/28-8/21 21/28-40/7 21/28-8/35 21/28-56/7 21/28-8/49
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