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Peter has 288 coins. 25% of these coins are 1 dollar coins. He wants to increase the number of 1-dollar coins to 64%. How many more 1-dollar coins must he collect?​

 Sep 25, 2021
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25% of 288 is 72

 

(288 +x)*.64 = 72+x

184.32 + .64x = 72 + x

x= 312

 Sep 25, 2021

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