Solutions by everydaycalculation.com
1st number: 7 0/10, 2nd number: 9 0/10
7010 - 9010 is -21.
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Related: 70/20-90/10 70/10-90/20 70/30-90/10 70/10-90/30 70/50-90/10 70/10-90/50 70/10-90/70
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