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Simple calculation of 17 / 50 × 9 × 20 / 51
50 / 17 by 9 by 51 / 20
=（50/17×51/20）×9
=15/2×9
=67.5
How much is 13 / 36 plus 11 / 12
13 out of 36 plus 11 out of 12
=13 / 36 + 33 / 36
=46 out of 36
=23 out of 18
Two thirds plus five twelfth is equal to?
8/12+5/12=13/12
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