At a baking competition, 0.5 dishes were cooked by Room 102, 310 were cooked by Room 104, and 15 were cooked by Room 106. What fraction of the dishes were cooked by Rooms 102 and 104? Express your answer in simplest form. BTW answer here bc i'm not primum or like plus...( answer in comment )

Step-by-step explanation:

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38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)