A dime is 10 cents, and three dimes is 30 cents. A dollar is 100 cents, so three dimes is 30/100ths of a dollar. The term "percent" means hundredths, and since there are 30 hundredths of a dollar in your three dimes, you have 30% of that dollar in those three dimes.
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Three dimes is equivalent to $0.30, which is 30% of a dollar. This calculation is based on the fact that a dollar is equal to 100 cents, so each dime represents 10 cents. Therefore, three dimes make up 30 cents, or 30% of a dollar.
Actually, it is both. Seven dimes (70¢) = 70% of one dollar or 7/10 of one dollar.
Fourty dimes in four dollars
A dime is one tenth of a dollar, so nine dimes is nine tenths (9/10) of a dollar.
10 dimes is 1 dollar, so 2,000 dimes is 200 dollars.
5 dimes is fifty cents. Fifty cents is a half dollar so the fraction is 1/2.