Respuesta :

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Answer:

The brother ate 1/6

Step-by-step explanation:

3/4 = 9/12

The whole pizza is 12/12

12/12 - 9/12 = 3/12

3/12 is what is left

The broter ate 2/3 of this  leftover

3/12 = 1/12 +1/12 + 1/12

the brother ate 2/12  =   1/6