Solutions by everydaycalculation.com
1st number: 21/40, 2nd number: 1 6/10
2140 - 1610 is -4340.
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Related: 42/40-16/10 21/40-32/10 21/80-16/10 21/40-16/20 63/40-16/10 21/40-48/10 21/40-16/30 21/40-80/10 21/40-16/50 21/40-16/70
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