Solutions by everydaycalculation.com
1st number: 21/24, 2nd number: 2 11/12
2124 - 3512 is -4924.
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Related: 42/24-35/12 21/24-70/12 21/48-35/12 21/24-35/24 63/24-35/12 21/72-35/12 21/24-35/36 21/24-35/60 21/24-35/84
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