Solutions by everydaycalculation.com
1st number: 25/30, 2nd number: 2 20/30
2530 - 8030 is -116.
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Related: 50/30-80/30 25/60-80/30 25/30-80/60 75/30-80/30 25/90-80/30 25/30-80/90
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