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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?​

 Mar 19, 2021
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288 * 0.25 = 72         ($1 coins)

 

288 - 72 = 216         (non 1-dollar coins)

 

216 / 36% = x / 64%          x = 384

 

384 - 72 = 312

 

Peter must collect 312 1-dollar coins.

 Mar 19, 2021

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