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Griffin and Marco have 342 coins altogether. Griffin's coins is equal to 4/5 of Marco's coins. How many more coins does Marco have than Griffin?

 Jun 13, 2022
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Let the number of Marco's coins==M
Then Griffin's number of coins==4/5M


M + 4/5M ==342, solve for M
9/5M == 342
9M  == 342 * 5==1,710


M==1,710 / 9==190 coins - Marco's share

342 - 190 ==152 coins - Griffin's share 

190  -  152 ==38 extra coins that Marco has.


Check: 152 / 190 ==4 / 5

 Jun 13, 2022

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