Answer:
= -1 1/5
Step-by-step explanation:
-3 3/5 ÷ 3
change -3 3/5 into an improper fraction
-3 3/5 = - (5*3+3) /5 = -18/5
-18/5 ÷ 3
copy dot flip
-18/5 * 1/3
rewrite to make the math simple
-18/3 * 1/5
-6 * 1/5
-6/5
now change this back to a mixed number
5 goes into 6 once with 1 left over
=-1 1/5
Let us take the case of 7 pounds for $8.47 first.
7 pounds of a product costs = 8.47 dollars
Then
1 pound of the same product will cost = (8.47/7) dollars
= 1.21 dollars
Now let us take the case of 9 pounds for $11.07
9 pounds of a product costs = 11.07 dollars
Then
1 pound of the same product will cost = (11.07/9) pounds
= 1.23 dollars
So from the above deductions we can see that 9 pounds for $11.07 is a better buy than 7 pounds for $8.47. I hope the procedure is clear enough for you to understand. In future you can use this method for solving similar problems.