Simple calculation of 6 / 7-8 / 7 * 5 / 8 + 5 / 14
6 / 7-8 / 7 * 5 / 8 + 5 / 14
=6 / 7-5 / 7 + 5 / 14
=1 / 7 + 5 / 14
=7 out of 14
=1 / 2
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