an assortment of coins contains 20 pennies, 2 nickels and 6 dimes what percentage of the coins are nickels?
( in the book the answer says 7% nickels)
i want to know how to work out the problem
didn't I just do this? http://www.jiskha.com/display.cgi?id=1315960681
dgjkfgkhjkjhgdfyuiufdsxcvhjkiuytredsxzcvhjytrdsz
To find the percentage of the coins that are nickels, you first need to determine the total number of coins in the assortment. In this case, there are 20 pennies, 2 nickels, and 6 dimes.
To find the total number of coins, you add up the individual quantities:
Total number of coins = 20 pennies + 2 nickels + 6 dimes = 28 coins.
Next, you need to determine what portion of the total number of coins is made up of nickels. To do this, divide the number of nickels by the total number of coins and multiply by 100 to get the percentage.
Percentage of nickels = (number of nickels / total number of coins) x 100
For this problem:
Percentage of nickels = (2 nickels / 28 coins) x 100
Simplifying the calculation:
Percentage of nickels = (2/28) x 100
Percentage of nickels = 0.0714 x 100
Percentage of nickels ≈ 7.14%
Rounded to the nearest whole number, the answer is 7%.