Solutions by everydaycalculation.com
1st number: 21/50, 2nd number: 1 2/10
2150 - 1210 is -3950.
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Related: 42/50-12/10 21/50-24/10 21/50-12/20 63/50-12/10 21/50-36/10 21/50-12/30 21/50-60/10 21/50-12/50 21/50-84/10 21/50-12/70
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