Solutions by everydaycalculation.com
1st number: 1 1/20, 2nd number: 2 0/10
2120 - 2010 is -1920.
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Related: 42/20-20/10 21/20-40/10 21/40-20/10 63/20-20/10 21/20-60/10 21/60-20/10 21/20-20/30 21/20-20/50 21/20-20/70
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