Mckenna collects pokemon cards and had 318 in her collection. She decided to give some to her younger brother so that he can begin his own collection. After giving him the cards Mckenna has 275 cards in her collection determine the percent of change in her collection to the nearest tenth of a present

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step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.