Solutions by everydaycalculation.com
78 - 67 is 156.
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Related: 14/8-6/7 7/8-12/7 7/16-6/7 7/8-6/14 21/8-6/7 7/8-18/7 7/24-6/7 7/8-6/21 35/8-6/7 7/8-30/7 7/40-6/7 7/8-6/35 49/8-6/7 7/8-42/7 7/56-6/7 7/8-6/49
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