It is 60/100, which can be simplified if you so wish.
3/5
There are 20 nickels in a dollar, so one nickel is 1/20 of a dollar.
There are 20 nickels in a dollar, so 8/20= 2/5 of a dollar.
1/5.
7/20
1/210 nickels=50 cents50 cents is half of a dollar
A nickel is worth 5¢ so 10 of them would be worth 50¢. A dollar is 100¢ so 10 nickels are a half-dollar.
15/100 or 3/20
7/20
A dime is 1/10 of a dollar. A nickel is 1/20 of a dollar.
17/100
17/100 of a dollar
Since there are 20 nickels in a dollar, 7 nickels is 7/20, or 35%.