You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[Q]: Cindy ’ s mom baked 41 cookies . Paul ’ s dad baked 38 cookies . They both brought them to school for a party . How many cookies did they have altogether ?
[A]: 79


[Q]: Sean has 55 blocks . 29 are eaten by a hippopotamus . How many blocks will Sean have ?
[A]: 26


[Q]: In a bag there are 13 red marbles , 5 blue marbles , and 7 green marbles . What percent of the marbles are green ?
[A]:
28