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The question asks for Xiaomin’s stickers as a fraction of Crystal’s stickers after the game. So the answer is as follows : Xiaomin’s stickers as a fraction of Crystal’s stickers after the game is 5/9.

Ans : 5/9.

 

My solution for the other question is as follows :

children : 4 units
adults : 1 unit

4 units x 5 + 1 unit x 8 = 28 units = $2800
1 unit = 100
5 units = 5 x 100 = 500 (You have left out this last step)

Ans : 500 people.

Also, to check : 400 x $5 + 100 x $8 = $2800 (100 people will not derive $2800)

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