Solutions by everydaycalculation.com
78 - 810 is 340.
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Related: 14/8-8/10 7/8-16/10 7/16-8/10 7/8-8/20 21/8-8/10 7/8-24/10 7/24-8/10 7/8-8/30 35/8-8/10 7/8-40/10 7/40-8/10 7/8-8/50 49/8-8/10 7/8-56/10 7/56-8/10 7/8-8/70
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