Mathematics
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24

A basketball team played 15 games and won 80% of them. If the team expects to play 30 games in all, how many more games must it win to finish the season with a 90% winning percentage?

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patii

So 80% of 15 games won equal 12 games won and 3 lost. This is because 15/10 = 1.5 and 1.5 x 8 =12. For 30, you do the exact same thing but with 90% instead. 30/10 = 3. 3 x 9 = 27. So they need to have won 27 games to get a 90% winning percentage out of 30 games. But since the question asks how many MORE games they need to play, it'll be 27-12 = 15. So they need to win 15 more games to get a 90% winning percentage

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