Solutions by everydaycalculation.com
1st number: 7 0/10, 2nd number: 5 0/10
7010 - 5010 is 21.
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Related: 70/20-50/10 70/10-50/20 70/30-50/10 70/10-50/30 70/50-50/10 70/10-50/70
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