If you have four quarters, three dimes, two nickels, and two pennies, what fraction of the whole coin collection is in dimes?

4 quarters = $1.00 
3 dimes = $.30 
2 nickels = $.10 
2 pennies = $.02 
Total = $1.42 
Then you take the amount of dimes ($.30) and divide it by the total ($1.42) 
Therefore your fraction is 30/142 or simplified 15/71.

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