Solutions by everydaycalculation.com
1st number: 16/70, 2nd number: 1 4/20
1670 - 2420 is -3435.
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Related: 32/70-24/20 16/70-48/20 16/70-24/40 48/70-24/20 16/70-72/20 16/70-24/60 80/70-24/20
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