Solutions by everydaycalculation.com
18 - 716 is -516.
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Related: 2/8-7/16 1/8-14/16 1/16-7/16 1/8-7/32 3/8-7/16 1/8-21/16 1/24-7/16 1/8-7/48 5/8-7/16 1/8-35/16 1/40-7/16 1/8-7/80 7/8-7/16 1/8-49/16 1/56-7/16
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