### Instruction: At the chocolatier, classic chocolate fudge costs 10 dollars a pound. Anna purchases $\frac{7}{9}$ of a pound of the fudge. The cash register rounds to the nearest cent, or hundredth of a dollar. How many dollars does Anna pay for her fudge?### Response: I need to find the cost of $\frac{7}{9}$ of a pound of fudge.
I can do this by multiplying the price per pound by the fraction of a pound.
[*:mathjax] cost = (10 dollars/pound) * (7/9 pound) = 70/9 dollars
Now I have a fraction that I need to convert to a decimal.
I can use long division to divide 70 by 9 and get a decimal.
[*:mathjax] cost = 70/9 = 7.777... dollars
The cash register rounds to the nearest cent, or hundredth of a dollar.
This means I need to look at the third decimal place and see if I need to round up or down.
The third decimal place is 7, which is 5 or more, so I need to round up.