Solutions by everydaycalculation.com
1st number: 8/10, 2nd number: 1 15/20
810 - 3520 is -1920.
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Related: 16/10-35/20 8/10-70/20 8/20-35/20 8/10-35/40 24/10-35/20 8/30-35/20 8/10-35/60 40/10-35/20 8/50-35/20 56/10-35/20 8/70-35/20
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